♪ this is "nightline." >> tonight, father and son explo explore explorers. when his son struck out on his own in a central american rain forest and never reported back, the family began a painful personal quest. >> i love my son, and i need to know what happened. >> plus, we'll meet a real fly girl soaring high above the water pulling impossible to believe stunts. it's fly boarding. the latest extreme sport. are you ready to channel your inner iron man? and the historic vote that took down a prime minister and rattled the global markets. after a seismic shift, what happens next? and will brexit's impact cross the atlantic? >> they took back their country. >> first, the

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good evening. thank you for joining us. tonight a harrowing saga. a father and son seasoned explore explorers. the son, following in his dad's footsteps. vanishes in a

jungle. >> reporter: a grad student wanted to be like dad. romen dial is a national geographic explorer and fearless ice climber. >> we road our bikes along the green ridge line. we hunted and skied in this velocity. >> reporter: they were best friends who shared adventures of life and the world. >> when he was six we did a 60 mile walk, just the two of us across an island. he was not an adrenaline junkie. i would admit that i am. he and i liked sort of science, and adventure and doing it together. >> reporter: we met this week in his beloved alaska where dial raised his family. >> i liked having him as a cam panon. i loved doing stuff with him. >> reporter: i'm sorry to make you talk about it all again. >> that's okay. in some ways

keeping it bottled up. >> reporter: cody roman struck out on his own, last seen heading into this forest solo on foot. >> i love my son. i need to know what happened. i want to know. it's just not enough to imagine it. >> reporter: for nearly two years dial and his wife, peggy, searched coast sta rica for the beloved only son. >> you don't know heart break until you're running through the jungle yelling your son's name. you know? >> reporter: national geographic cameras documented it in the series "missing dial". >> being his mom, i wanted to retrace his steps. i want to see where he was. i want to see if maybe there's anything that i would see that was different, that someone else might not pick up on. >> reporter: when cody roman said he was going, his dad supported him. >> he was old style. >> reporter:

pretty good at checking in via e-mail with mom and dad. >> at the end of cody roman's e-mail, the last thing he said was it would be difficult to get lost forever. i've been haunted by those words ever since. and then we didn't hear anything from him. a lot of time had gone by, and i checked my e-mails. i was like, whoa, when did he send this e-mail. and it was two weeks old. he's like ten days overdue. >> reporter: roman called the authorities. they began the search and roman got on a plane. >> it never crossed my mind not to go. he was hurt. that was my initial thought, he was hurt. not that he would get lost. he was careful about not getting lost. >> reporter: had he been hurt, kidnapped, or worse, murdered? after two weeks and still no sign of the 27-year-old, the costa rica authorities called off the search, but the dials did not. >> i held out all kinds of hope. we had psychics who said oh, i can see

he's under boards and he's alive, but he's in a jail sort of thing. >> reporter: you cling to that hope? >> sure. >> reporter: you kind of have to. >> peggy, more so than i. after a while, i was like, you know, he would have contacted us. kidnappered would have sent us a command for money, and i kind of came to the realization after three months or so that he was most likely dead. >> reporter: they brought in their own private investors to the jungle. >> i kind of feel that something criminal happened. >> reporter: a clue. cody roman's backpack found at a local hostile here on the edge of the park. he'd also been spotted around here by locals. >> the red cross had said to me, oh, your son was seen with this local bad guy, the drug dealer, and they walked across this trail, and i was like that doesn't sound like my son. >> reporter: the theory took

shape. a suspect emerged. a guide. >> 30 people saw you take him in there. no one saw you bring him back. >> reporter: he claimed these gold miners had killed cody. >> reporter: but that just at no time add up. >> it would have been good if you han for help. that would have been the best scenario. >> i try and run, but i can't do nothing. >> reporter: roman began to think he was delusional. >> you're eerither making it upr thinking it's true or you're lying. >> reporter: still the costa rica fbi changed it from missing person to homicide, and cody's mom and dad went to washington. >> i think he was murdered. we feel we know who may have been involved in his murder. >> it's been hard. he's on our mind constantly. it's hard to move forwd

we get called back to look for him. >> reporter: and with nothing to show for it, the dials were back home. national geographic producers were back home editing a missing person show still without a body when a call came from rose a ree ka. human remains found and camping equipment. >> we sent them our dental records. they said the teeth matched. they september me a copy of the skull in the place. >> reporter: talking act your chi -- about your child's dental records? >> yeah. i guess it's -- yeah. >> reporter: and what does the evidence point to? >> his body was found. to me, that's hard to ignore that. it just doesn't seem like foul play, though. does it? >> i think he had set up camp. and then it sounds funny, but a

is notorious among the locals for big tree falls. >> reporter: a freak accident? >> it seemed like a straightforward descend that happened in a remote place. >> the top of his pack had his passport and money in it. if somebody killed him, why would they do it in a remote place and leave his passport and money? >> reporter: dna reports are expected any day, and they hope this is their son, and they hope their theory of how he died is true. they're not pressing charges against anyone. >> at this point i'm happy for the narrative i have. if it's true or not true, the feeling is right for me. >> reporter: you found the truth, but you've also found a horrible truth. >> it was heart breaking, but on the other hand, at least it wasn't a murder scene. i just wouldn't want to have to spend my whole -- the whole rest of my life wanting to ring somebody's neck. >> reporter:

visited the spot where their son was found. >> i have a chronic pain that won't go away. i probably cry every day. >> reporter: i notice sometimes you refer to him in the present tense. >> do i? well, it's hard. yeah. yeah. >> reporter: i'm nick watt for "nightline" in anchorage, alaska. >> the conclusion of "missing dial" airs this sunday on the national geographic channel. next, the latest extreme sport will have you believing a woman can fly. if you think you've seen it all, ...well do i have a surprise for you. it's red lobster's new lobster and shrimp summerfest! with the lobster and shrimp... ...you love in so many new dishes, you're gonna wanna try... ...every last one. like the new coastal lobster & shrimp. with a wood-grilled lobster tail, ...wild-caught red shrimp crusted with panko, ...and shrimp fresh off the grill and brushed with...

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it's like back to the future for new extreme sport, fly boarding. bringing out the inner superhero in athletes around the world. we're up up and away. >> reporter: this is fly boarding. the very latest in extreme sports with a twist of sci fi. >> the best thing is the fact that you're up in the air and you feel like you're flying. >> reporter: those pushing the boundaries, women, the world over. that figure flipping far above the water is gem ma weston from new zealand, boldly flying where no one has before. >> it's pushing the boundaries of what's possible, and you feel a little bit like a superhero. >> reporter: a superhero attached to a hoverboard. only invented

professional jet skier. jemma couldn't resist us. if you had to describe yourself age ten? >> probably quite a few scrapes on my knees. playing soccer and swimming. just constantly keeping active. >> reporter: you never sat still. i get the sense you were not sitting still as a child? >> i didn't as a child. and still now, like, those who know me will be like just calm down. >> reporter: her intrinsic thrill seeking career led her to a career as a stunt woman. only discovering fly boarding a few years ago, she entered the world cup in dubai as an unknown. she crushed it taking first place. >> talk to me about the back flips. >> the most i can do before i hit the water is three. my best trick, i would say,

people can do. it's kind of a side flip. i compress my body to the side and let my knees rise up over my body and rotate. it's a forward moving side flip. >> reporter: after her gold cup she had two goals, winning again this year and bringing fly boarding to the masses. but on her own 800 miles from home, even she gets home sick. she called her little brother, also a fly boarder, to join her. has she always been like this? >> like what? stubborn? >> reporter: has your sister always been someone who goes after it. >> jumping off roofs and onto trampolines. >> reporter: i bet your parents loved that. >> it's our other siblings that are the timid ones. we got the

>> reporter: i love that there are tourists watching. they're like i've never seen this before. they train in florida with a power fly team. >> reporter: how is it to be with each other on the good days? >> it's like high fiving in a way. >> screaming from the shore. >> reporter: at some point when you nail it, do you go to him for the high five? >> not often. >> it's almost like i'm a bit jealous that she got it. >> reporter: jealous? okay. the truth comes out. this year two compete at the 2016 fly boarding european championship in france. >> she's something. she has a natural talent in fly boarding. when she came, it was about a year ago today, and here she is the world champion. >> reporter: he says the equipment is evolving as quickly as the sport. already they control the board and the jet ski at the same time by remote. >> it allows you to

throttle when nobody is on the ski. >> reporter: so you're in the air and you're controlling your own power? >> that's correct. >> reporter: with this? >> with this. >> reporter: that's incredible. >> basically it has a start. >> reporter: and there we go. >> and you have your stop. if we could do it without the hose we would. >> reporter: one day, right? >> it's coming. >> reporter: and that day could be soon. they're developing a futuristic hover bad wiboard with hopes tht need a jet key and hose. but right now they're saying anyone can fly board. >> from nine to 89 years old. >> reporter: 89? i need to see that. one reason the most successful extreme sports take off when the average person picks it up. like snow boarding. once an outlier. with celebrities giving it a try, fly boarding could be

when they goaded me into giving it a try, well, i can't let leo show me up. the concept of me out there is amusing. we'll give it a go. with no less than the world champ as my coach, i head into the deep. believe me when i tell you she makes it look easy. >> stand like iron man. straight up. that's it. there you go. >> reporter: if she shooars lik an eagle, i'm like an overstu overstuffed pigeon with a bum wing, but i do manage to fly. i can't imagine doing a back flip right now. for a moment. >> okay. i get it. >> yeah. you can actually be way more

>> yeah. >> reporter: with that, they're back to work. days later in france where she stuns in the opening rounds and semi finals. >> a great competition, and the girls are good. >> reporter: little brother, beau, places sixth in the men's division overall. jemma flips, twirls, and flies to the top spot. she's the champ once again proving what this brother sister duo have known all along. >> new zealand, our national bird is a flyless bird. they can't fly. we're proving they can fly. >> reporter: for "nightline," gloria rif rare ya. >> they call it extreme for a reason. our thanks to gloria. next, after brexit, what happens now?

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z212mz zi0z y212my yi0y and finally tonight, it's called brexit. last night's historic vote that saw the united kingdom separate from the

and now the day after. abc's chief foreign respondent is assessing the fallout. >> reporter: a new day dawned over big ben and the morning papers blared the new, britain has a new place in the world. >> the british people have spoken and the answer is we're out. >> reporter: some were stunned. >> i can't believe it happened. >> reporter: others, heart break like j.k. rolling who said i don't think i've ever wanted magic more. for those on the winning side -- >> winston churchill would be proud of it. well done great britain. >> reporter: it was an emotional campaign, and immigration was a driving issue. low wage workers from poland, romania and other countries building resentment, and refugees sparking fear. this controversial poster captivating the fear of so

economic markets around the world, 2 $.1 trillion lost. >> there's a great deal of concern that this is not a one-day event. it's its own little economic earthquake. >> reporter: at the end of the day, no more uncertainty on the stability of the markets. only certainty from donald trump. who landed in scotland this morning. >> basically, they took back their country. that's a great thing. >> reporter: which is one way of looking at how the american public may vote in less than five months. on the democratic side, hillary clinton releasing this campaign ad today mocking donald trump's golf course appearance. >> are you traveling with any of your foreign policy advisors? >> well, i've been in touch with them, but there's nothing to talk about. >> reporter: the question now, is the historic vote driven by immigration fears and a fierce discussed with politics, a sig

atlantic? we'll find out in november. for "nightline," we're in london. >> it was winston churchill who sid success is not final. failure is not fatal. it's the courage to continue that counts. thank you for watching abc news. tune into good morning america tomorrow. good night, america. have a good weekend. read this again. come on, ray, honey, it's a great present. what you wrote on it is perfect, and you can't change it now anyway because it's christmas eve. once more. "merry christmas. we love you. michael geoffrey, ally, debra, and ray." it's stupid. oh, ray, honey, no, no.

accept it. you had a great idea. why'd i put "xmas"? i don't like "xmas." i--i x'd out the name of the birthday boy. ray, sit down. stop obsessing, ok? i love it. my god, it's been 2 months of toaster. hey, this is going out with my name on it. did you wrap the one for your parents? yes. yes. which wrapping? the foil. no! that tips off the gift. what? foil wrapping. it's a metal toaster. oh, why don't you just wrap it in toast? look, if i'm gonna drive all the way up to connecticut to spend christmas day with your parents, i want a good reaction when they open the present. and the foil wrapping kills that? i don't know. you think--you think this toaster thing is funky enough for them?