the chopper this is "nightline." >> tonight, when bears attack. summer tourists in yellowstone on high alert right now after an experienced hiker was mauled to death. so what should you do if you come face to face with one of these creatures? tonight we hear from surviveorssurvivors. >> plus the next generation of real tee realty stars. how they're hoping recent country's most cutthroat >> and is "baywatch" back, the shot. this time could it be zach ephron and the rock running shirtless on the beach?

>> we're penatonix. >> if you're suffering from constipation or irregularity. powders may take days. try dulcolax. gentle overnight relief unlike miralax. designed for dependable relief. >> number one in 60 seco john is just two weeks away from walking down the aisle with emily. didn't see that one comin'. now we're groomsmen.

we're just 475 short miles away from... shenanigans. it's not going to get too crazy. might get a little weird. you have places to go. let us worry about getting you there. bp gasoline with invigorate. fuel the journey. s. good evening. tonight in one of america's most popular and iconic national parks a murder mystery. the suspect is not a man but a bear. authorities believe they have erer grizzly, an animal has taken down one person and raised concern in yellowstone at the

height of the tourist season. >> reporter: bear encounters captured on camera in yellowstone with alarming frequency this summer. >> last evening on the driver's side window and stuff had paw prints smeared across it. >> reporter: not with old faithful's regularity, but enough to put park visitors on high alert. >> i don't like all of the bear stories i've been hearing. >> reporter: this mother black bear caught charging tourists to protect her cubs. >> there is a bear on my car. oh, my gosh. >> reporter: this family in their car, terrifyingly close to a grizzly. an encounter turned deadly for lance crosby, an experienced worker who worked with the park urgent care clinics for past five seasons. the 63-year-old montana native was missing for a day and a half before his body was found by authorities in a popular off-trail area. the grizzly bear is believed to have attacked because she was protecting her cubs.

>> he had defensive wound on his forearms he was alive when he encountered the bear. >> reporter: authorities catching the aggressive animal believed for the attack and her cub. >> they did catch a female adult bear in the process of doing testing with the bear to make sure we have captured the right bear. >> reporter: if the tests confirm the bear is involved the bear will be euthanized along with her cub. there are fears if the cub survives it could learn the predatory behavior after watching the attack. somest mate estimate there are 800 grizzlies in yellowstone and 3.5 million visitors to the park every year. authorities say these attacks are rare. this is just the eighth bear related fatality in yellowstone in 100 years. but encounters seem on the rise. the summer months bringing large crowds and bears. not just in yellowstone. deeply. you could feel the teeth. >> reporter: this man landed in the hospital after he was

attacked by two blackberries on a deer hunting trip in alaska with his son-in-law. his son-in-law firing at the two bears, saving both of their lives. >> i see the two small cubs, maybe 30 pound apiece running up this slope. this mother bear who was closer to me comes running towards me. >> reporter: steven kritchbaum in george washington national park with his dog knows firsthand the ferocity and terror of a bear attack. >> she bit my thigh and knocked me to the ground. i'm on my back. and she is bite might legs. and i'm kicking like this. >> reporter: his dog spring to his aid. attacking the bear. allowing him to grab for a rick and fight back. he was fortunate as bears can grow as big as 7 feet and well over 1,000 pounds. >> oh, there is a bear. a bear right across.

>> on the history channel show "alone" these powerful animals have the seasoned outdoorsmen fearing for their lives. >> just found a bear. >> this is crazy. >> reporter: it centers around ten survivalists trying to jut last each other in remote wilderness of vancouver island. one competitor barely lasting through the first night. >> bear. >> reporter: another giving up after getting charged by ape bear. >> oh, [ bleep ]. >> hey, bear. >> i was just charged by a bear. . he just kept coming. i back add wayed away into the woods. >> there was a bear den adjacent to my camp. >> reporter: the finale airs in two weeks. allen kay is one of four left battling in the wilderness. >> #100 yards away. >> reporter: he managed to survive in bear country for weeks. >> i didn't really feel any direct threat. i don't think the bear did. i made it a pin the to make a little extra noise as i move around the island so they knew,

here he comes. >> reporter: his strategy all about preparation. >> just really disciplined how i handled my food. don't eat where you sleep. just not something you do in predator country. >> reporter: some times encounters are unavoidable. >> i really think the key if you have a bear encounter. first prevention. make noise. don't be super still, watch your scent. be aware. >> reporter: to demonstrate what to do confronted by a bear in the wild. >> oh. >> does it hurt to have your head inside a bear's mouth? >> not really. >> reporter: they got up close and personal with a 1,300 pound grizzly. >> we have confidence in one another. >> reporter: this is the stunt bear bart, recognizable from "game of thrones." bart's trainer is doug sousse, he says not all bears are created equal. >> grizzlies would be the biggest concern. >> reporter: but sousse says if you do happen to come in contact

with a bear there are a few things you should do. talk slow. move slower. >> slowly back away, increase the distance between you and the bear. absolutely never run under any conditions. >> reporter: if a bear charges protect yourself. >> if a bear were ever to be on top of you. what you would do to protect one's vital spots. cover your face and neck like this. >> reporter: with a little bear spray you can hopefully avoid position. defense. this would be in your holster. >> pull the safety off. just like that. >> yes. >> this is why you you. you will give one quick spray. perfect. perfect. often times that one quick spray will be enough to deter the bear. that would be great.

so, just that pepper in their eyes, mucous membranes is often times enough. if it is not enough the bear keeps coming towards you. same posture like you did. unload the whole can. >> okay. wow. >> for "nightline" in yellowstone national park. >> next here, much more than meets the eye for this crop of young brokers. could they be the next real estate reality stars? >> zach ephron and the rock, fueling speculation "baywatch" may be coming back and the stars getting ready to suit up and strip down. ? my li'l buddy? and what if this happened again? i was given warfarin in the hospital but i wondered if this was the right treatment for me. then my doctor told me about eliquis. eliquis treats dvt and pe blood clots and reduces the risk of them happening again. not only does eliquis treat dvt and pe blood clots,

but eliquis also had significantly less major bleeding than the standard treatment. knowing eliquis had both... turned around my thinking. don't stop eliquis unless your doctor tells you to. eliquis can cause serious and in rare cases fatal bleeding. don't take eliquis if you have an artificial heart valve or abnormal bleeding. if you had a spinal injection while on eliquis call your doctor right away if you have tingling, numbness, or muscle weakness. while taking eliquis, you may bruise more easily... and it may take longer than usual for bleeding to stop. seek immediate medical care for sudden signs of bleeding, like unusual bruising. eliquis may increase your bleeding risk if you take certain medicines. tell your doctor about all planned medical or dental procedures. eliquis treats dvt & pe blood clots. plus had less major bleeding. both made switching to eliquis right for me. ask your doctor if it's right for you. all: milk! milk! milk! milk! milk! okay! fun's over. aw. aw. thirsty? they said it would make me cool.

they don't sound cool to me. guess not. you got to stick up for yourself, like with the name your price tool. people tell us their budget, not the other way around. aren't you lactose intolerant? this isn't lactose. it's milk. at intel, they make technology that gives you the power of a pc and fun of a tablet. i could turn it into a tablet and do my spreadsheets? i said fun of a tablet... exactly! upgrade to a 2in1 with intel inside. i'm jerry bell the second. and i'm jerry bell the third. i'm like a big bear and he's my little cub. this little guy is non-stop. he's always hanging out with his friends. you've got to be prepared to sit at the edge of your seat and be ready to get up. there's no "deep couch sitting." definitely not good for my back. this is the part i really don't like right here. (doorbell) what's that? a package! it's a swiffer wetjet. it almost feels like it's moving itself. this is kind of fun. that comes from my floor? eww!

this is deep couch sitting. [jerry bell iii] deep couch sitting! do you like the passaaadd? it's a good looking car. this is the model rear end event. the model year end sales event. it's year end! it's the rear end event. year end, rear end, check it out. talk about turbocharging my engine. you're gorgeous. what kind of car do you like? new, or many miles on it? get a $1000 volkswagen reward card on select 2015 passat models. or lease a 2015 passat limited edition for $189 a month after a $1000 bonus.

real estate has made for reality tv gold. time and again. from "million dollar listing" to the property brothers. now something different. super young brokers working in the most expensive cutthroat market in america giving specialty clients some hard lessons in both realty and reality. here's abc's sarah haines. >> reporter: new york city one

of the most competitive markets in the country. 40,000 young adults move here each year. >> everybody wants to be here for restaurants. night life, shopping, relationships, drama. everything like that. >> reporter: low inventory and little space make the hunt that much harder for first time renters like brianna. this 23-year-old looking forward to living it up in a hip, trendy neighborhood on manhattan's lower eastside. >> we definitely want a two bedroom apartment. >> reporter: to save up the cash she crashed with her parents in suburbia for two years. >> we wanted to move out of college. we figured we had to save a little bit. doing that. >> reporter: how hard is it to do that what the help of parents? >> it is really rough. i had to go to save but it is running out quickly. >> reporter: do you have examples of apartments you said no way? >> we would go and see the apartment with pictures not on the listing online. this is not the same apartment.

a very sketchy building. not in a safe area. >> reporter: fed up, brianna and roommate chelsea turn to next step realty. >> we started with four employees and now have four offices. >> reporter: a specialized firm where young brokers help young clients navigate the crazy estate. >> we are all in our 20s. we work hard and we play hard. >> reporter: they're adventures are all part of the new reality show, airing on abc family. this is 6700. there are plenty of big rents. >> ooh. >> reporter: and not so big spaces. >> wow this is tiny. >> believe it or not this is spacious for upper eastside. >> there is inner office drama. as brokers date each other. flirt with their clients. >> gorgeous. >> yeah, it is a very nice view. >> reporter: and wrestle with high stakes office politics.

>> we are evaluating things like their performance, customer reviews. >> reporter: mat bowt bowman, top broker takes them on as clients. >> they don't call me the closer for nothing. >> reporter: they want a two-bedroom apartment for under $2,500. >> yeah, we are independent women. >> reporter: this what the budget gets them in the trendy dream neighborhood. >> i feel like this couldn't fit a twin bed. i don't want this bedroom. >> yeah, i don't know if i can have this one either. >> these girls need to adjust expectations. new york city is unlike any other rental market in the country. space is a premium. sometimes my job to make clients see the possibility in a tiny space. >> for anyone in the market to get an apartment. any tips? >> we get a lot of us who come to us, who say, i need, i need, i need. i am going to say, you can, but. then we massage the way that they can get their apartment and make it comfortable for them.

>> be ready to bend a little. >> totally. and girl, i know how to make them bend. >> cut. >> reporter: compromise is a recurring theme with clients like randy and daniel. recent college graduates grapple with sticker shock. what do you want to have in your apartment? >> washer/dryer would be nice. >> also a nice living area, space, so we could put a sectional couch. get the 50, 60 inch tv on the wall. >> right. >> the guys are looking for amenities that aren't realistic for their budget of $3,000. i think they're used to their parents house that have great amenities. you are on a college budget or graduated you can't afford these types of things. >> reporter: the broker helped clients visualize potential. finding creative solutions for small spaces. >> the master bedroom is that room right there. >> reporter: this is the living? >> right. >> okay. >> but it also can be.

that's the master bedroom. waiting to see if you caught on. so this is a convertible two bedroom. >> ah. >> so you divide it right here. you have a huge living room area and a huge bedroom. >> because new york city rent is so high. people will save money by converting a one bedroom to a two bedroom. what they do is put up a wall and create their own room. not surprised randy and daniel are cool with putting up a wall. i'm sure i could convince them to use bunkbed. >> reporter: not just the clients of against the wall. being a broker in new york city comes with pressure to close deals fast. >> we make our entire income of based on commission. if we don't close the deal. we don't make money. i want to do something that will be comfortable, logical, affordable. the only reason the deal will close. otherwise i will lose them completely and end up with zero. >> no more [ bleep ]. >> the anxiety to close the deal. i have never seen the people so shocked. >> reporter: can often cause frikt

friction around the office. >> what happened with mrs. foley and her son? >> you booked them early. >> what do you mean i booked them early? >> there was nothing to show them. i had to push it back. not going to have them come to town and show one apartment. >> there are apartments. >> no there are not. >> i will black list david, not give him clients. hopefully he will learn his lesson. >> reporter: back with brianna and chelsea, matt is hoping to sell them on a new neighborhood. the upper eastside where the two can get a little more for their money. he found this 600 square foot, two bedroom apartment, that scrapes the ceiling of their budget at $2,550. >> ooh. this is a good size. >> check out this massive closet. >> oh. >> chelsea. >> lucky. >> reporter: initially they harnt aren't sure this is the one. matt is determined to get this deal done. >> i have had apartments where i don't want to show it.

cockroaches have scurried across the floorbuyer or seller the i have killed cockroaches without them knowing it to get the deal done. >> is this the apartment? >> totally. >> i will help you. give you the dollar to get started. >> did you bend on some things? >> we did. bended on location. matt convinced thus are are good restaurants and bars in our area. we bended a little bit the we are happy we did. we are surprised. >> reporter: living big dreams in a slightly smaller space. for "nightline," i'm sara haynes in new york. >> big thanks to sarah. one of my weekend gma friends. and produced by abc news. you don't want to miss the premiere tomorrow, ontion afamily, at 9:00 eastern. if you have been missing "baywatch" who hasn't? we have news that may make you

want to run slow-mo on the new movie. wait until you hear who the star maze be. geico motorcycle, great rates for great rides. you can't put two in one. at intel, they make technology that lets a device be a laptop and a tablet, so you can put two in one. no, you can't. can. can't.

thirst for the extraordinary. ahhh perrier!

finally tonight. important cultural news. abc news learned that hollywood may be on the cusp of reviving a pillar of american entertainment. "baywatch." beautiful people saving lives and slow-mo running montages. "baywatch" was its own breed of television. a fan favorite and also a punchline, the '90s drama of the california lifeguard ran for 11

seasons making david hasselhoff in the red bathing suit even more of an international star. now, 26 years later, "bay watch the movie" and hollywood hunk zach efron rumored in talks to star opposite dwayne the rock johnson in paramount's reboot according to "the hollywood reporter." reps have not confirmed. the rock heading to twitter, saying me and zac efron been talking about this one for a long time. someone get my baby oil, #ratedr. >> so stoked, brother. baby oil for two, please. >> telling abc news, it has no comment. no mystery why efron may be up for the role. here he is in "neighbors." he has won best shirtless performance of the year, mtv movie award two years running. once he dons the tight red trunks, fans will probably be

begging to get rescued.