yeah baby i belong to you this is "nightline." >> tonight, stolen babies. they were illegally placed for adoption by this doctor who sold newborns on the black market. dna test that changes everything. >> you could call right now. do you want to do that? >> tonight, you will see one woman find her long-lost birth mother. plus, she's been called the greatest free diver in history. but now it looks like she's had her final underwater adventure. tonight, inside one of the most extreme sports on earth. why it can turn so dangerous so fast. and benefit wars. netflix announcing a year of paid parental leave. now other major companies are

following suit and piling on the perks, from vacation styipends to bowling alleys. how far can this go? first the "nightline 5." >> when salon pas began in japan in 1934, a single patch could help pain relief. perfect for back, muscle or joint pain, for targeted relief. fresher dentures with polydent. for the best first impression. love loud, live loud, polydent. number one dentist recommended. >> number one in just 60 seconds. [muted singing throughout] these girls have waited 62 days for this concert tonight. so far i've counted 32 omgs, 75 lols, 13 yolos, and i'm super tired! tweens--fun age, huh? you have places to go. [girls squealing with delight]

let us worry about getting you there. bp gasoline with invigorate. fuel the journey. good evening. tonight, right here, you are going to see a 50-year-old family mystery solved.

the story starts with a doctor who illegally sold many of the babies he delivered. "nightline" found some of these babies, now all grown up, and wait until you see what happened next. here's my "nightline" coanchor juju chang with an extraordinary story for our series "face to face." >> reporter: for christie hughes, this dna test could hold the answers to a lifetime of questions. >> i just feel like a part of me is missing. i would like to know if the horoscope i'm reading is the right one. my actual birth date. am i really a year older than i feel i am? >> reporter: christie and her seven friends, brought together by a terrible secret, were known as the hicks babies. newborns illegally sold into adoption by a now-notorious doctor. their life stories a mystery that began in mckaysville, georgia, a small town nestled in the foot of the blue ridge mountains. >> there was a doctor in georgia that was selling babies.

>> what was the price? $1,000. >> reporter: $800 to $1,000 per baby. 200 babies in all. illegally sold by dr. hicks between 1950 and 1965. melinda dawson was one of them. >> my mom was told that she could not have children and she wanted a baby, so my father and her purchased me from the doctor. >> reporter: he routinely forged birth certificates, making it impossible for christie and all the hicks babies to ever find their birth parents. >> we've just never had any definitive answers. nobody to turn to. it's been a big dark secret. >> reporter: for christie and the hicks babies, time is of the essence. their chance the of finding a birth mother still alive fading. so "nightline" asked the genealogy site ancestry.com to see if they could help. >> what would it mean to you to, ding, find a sibling? >> that would make me feel i found a part of my true self. >> reporter: the hicks samples are sent to a lab.

ancestry.com agreed to analyze their dna for free. >> when we share this information with the hicks babies this will be the first contact they have with the relative in their entire life. >> reporter: against the odds melinda and others discover second and third cousins. >> hey, miranda, are you my cousin? >> oh my gosh, i'm talking to a family member. >> reporter: for christie hughes, a much closer match. her dna leads to a first cousin, a woman by the name of jackie. >> she's agreed to talk to you. we could call her right now. do you want to do that? >> i'm a little nervous. but -- >> okay. >> this blows me away. [ phone ringing ] >> hello? >> hi, jackie, this is christie. i'm your cousin. >> it's nice to meet you. i guess you've got a lot of questions. >> yeah. i'm just kind of amazed right now. kind nerve shock. >> reporter: even more shocking, christie's cousin reveals two aunts who gave birth at the hicks clinic. one of these two women could be

christie's birth mother. >> one passed away about four, five years ago. the other one is still alive. >> reporter: one of those women had a son. roger. who could potentially be christie's biological brother. he agrees to take a dna test. >> wow. it's -- literally speechless. >> reporter: the results solving a 50-year-old mystery. christie finds a brother she never knew she had. and best of all, her biological mother is still alive. >> i know this is real. but i'm still kind of in shock. there's a part of me in my heart doesn't want to get too vested. >> reporter: night lin brings christie to rural georgia to meet her newfound biological family. first stop, that brother. >> my heart's racing a little bit. scared, anxious, happy. i've been looking forward to this -- it feels like forever. >> deep breaths. >> 31 years and i've got two minutes left. >> reporter: and the moment

they've been waiting for. >> hello. >> hi, roger. >> hey. >> big brother. >> little sis. >> reporter: growing up, roger says he always dreamed of having a little sister. >> what do you think dr. hicks took from you? >> a lot of love. a lot of memories. the joy of having a sister. you know. i always thought i had a sister to pick on or pick on me. >> reporter: through the years roger and younger sister christie lived parallel lives. school days. awkward teen years. marriage. children. neither knowing that the other existed. >> when you got that phone call that this was, in fact, your sister what went through your mind? >> happiness.

anger. that someone stole 51 years from me. i was pretty angry. >> reporter: roger's mother, thelma tipton, was a single mom at the time and says she never forgot the daughter she lost 51 years ago. her voice now ravaged by throat cancer, but she says learning her daughter is still alive has given her new reason to live. >> i'm just very anxious. wondering if she'll like me. >> you okay? >> i just want to see her. >> go ahead. >> reporter: a first embrace. and for christie, those words she's always wanted to hear. >> i love you. >> i love you.

i love you. you're pretty. >> well, i got it from you. >> i'm sorry. >> don't be sorry. what are you sorry for? >> i'm not -- >> reporter: turns out her mother is apologizing for something that was beyond her control. she says dr. hicks told her a sinister lie -- that her daughter was stillborn. >> what did he say? >> she had a bad heart. and i believed him. he stole my daughter. >> reporter: dr. hicks died in 1972, having never been held accountable for these black market babies. >> i don't think he had the right to play god and take our -- bust our family up. >> i missed out.

seeing her growing up. missed out on her first tears. missed out on -- her first day in school. missed out on her wedding. missed out on everything. >> reporter: the story first came to light in 1997. abc's "primetime live" went with a group of hicks babies on a haunting tour of what used to be the clinic. >> i know my father said they handed me through the back door. >> reporter: nearly two decades later, "nightline" returns with christie and her mom. for thelma, this is the first time she's been back since her daughter was born. >> it's hard to retrace these steps, isn't it. >> it is. 51 years. >> what goes through your mind when you know this is the building? >> it's not good. it's kind of eerie standing here. >> reporter: the moment proves overwhelming. >> you okay, mom? should we call an ambulance?

you got her? >> yeah, i got her. >> okay. >> reporter: the moment passes. even with the knowledge of all that they've missed, a bittersweet feeling of triumph. >> we one-upped him, didn't we? look at us now, standing back here together. >> standing together. >> we got the best of him, didn't we? >> we did. >> reporter: they count their blessings. >> our gracious heavenly father -- >> reporter: celebrating newfound family making up for lost time. >> i got both my kids, my son-in-law, and my daughter-in-law, and my grandkid grandkids. i'm happy. >> reporter: for "nightline," i'm juju chang in georgia. she was a 23-time free diving world champ action setting 41 different records. but just days ago, she vanished in the depths. tonight our reporter tries his hand at one of the most perilous

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she is considered to be one of the greatest athletes ever in

what is one of the world's deadliest extreme sports. free diving. natalia mall which a nova went for a dive on sunday and she simply vanished. tonight as her family gives up hope, abc's matt gutman takes us inside a dangerous and increasingly popular sport. >> reporter: a two-day search for the champion of the deep called off. 53-year-old free diver natalia mall vanished into the kepts she spent a lifetime exploring. the mother who came into the sport late in life is recorded one of the greatest free divers in the sport's history. a sport that demands participants push their bodies to the limit, holding their bretts while they dive under water as deep, as far as they can. molchanova holds records

chronicled on her website. including breath hold, over nine minutes. depth, over 400 feet. more than two statue of liberties stacked torch to base. she'd mastered the pool, swimming nearly lyly 800 feet, two and a half football fields on a single breath. this weekend it was a shallow recreational dive barely 100 feet that may have killed her. sport officials say she disappeared off the coast of the island of ibiza where currents were strong. the sport's governing body writing, her friends lost her, tried to look for her, and then called for help. the surface search is still continuing. but today molchanova's son alexi, champion free diver himself, told the "new york times" times", "i seems she will stay in the sea, i think she would like that." her peers in the the diving world echoing the sentiment. >> her death is a huge loss to the free driving community.

a goal-oriented, driven, free diving machine. >> reporter: tanya streater competed against molchanova many times. >> there isn't a free diver that has a record that hasn't been beaten by natalia. right before i dive i spend time in the water doing breathing exercises to lower my heart rate. that last breath can create enough pressure inside the lungs that it inhibits the heart from beating properly. it has a narcotic effect. it makes you feel a little high or -- i like to say that it makes me feel like half a glass of wine on an empty stomach. just a little bit loopy. >> reporter: while increasingly popular, free diving is considered buffett deadliest extreme sports. it has claimed many of its greats. like audrey mistray seen here, and nicholas pavoli.

>> never take a dive for granted. you don't know what dive is going to be your last. >> the most dangerous sport in the world? >> i would say so, except competitive russian roulette. >> reporter: for him the dance of danger attracts him and so many others to the sport. >> you're taking your body where it seriously doesn't want to go, to the point where everything is contracting in your body. >> why? >> yeah. people want to know. >> i guess, what can you do? what are we capable of as a species? people. >> reporter: considered the foremost authority on free diving education he lent his skills to make the movie "the cove" and trained david blaine for his special "drowned alive." i experienced some of the intense mental and physical sport. taking the turn in the water in the cayman islands, trained to free diver. first the breath hold.

all these lessons, the breathing, the mental call calisthenics calisthenics, geared to teaching me to ignore my body's cry for oxygen. see those convulsions? my body demanding to breathe. but that's the point he trains you to ignore. and after an hour of instruction -- >> up. breathe. breathe. breathe. breathe. breathe. breathe. >> good job, matt. >> whoo! >> that's a good, good solid time. i mean, for someone who's a free diver already. so that's a great time, an amazing time. >> reporter: and free divers are pushing the limits of their sport in many ways. krack runs an underwater obstacle course where free divers compete using water scoot tears. all in hopes of winning a thousand bucks and more importantly bragging rights. others like william winram and fred bule push the limits further by holding their breath while swimming with sharks. >> you don't think about the

fact that you're not breathing, that you are deep, that you need air. the animals can come closer to you. they don't feel me around them. >> reporter: it's all about the challenge and the thrill. but the pressure and lack of oxygen down there mean blackouts under water are coming. while these guys were revived, it seems like molchanova might not get that chance. while the very depths she conquered might have claimed her, it was in those depths that she felt most at peace, saying in an interview last year, "when we go down, if we don't think we understand we are whole, we are one with the world." for "nightline," matt gutman in los angeles. up next here, netflix may be best known for shows like "house black." wait until you hear what the company itself just did for its

for paid parental leave? 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. can. upgrade to a 2in1 with intel.

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thirst for the extraordinary. ahhh perrier! speaking as a working parent, there is literally nothing more valuable than time with your newborn child. which is why a new policy announced today by the tech giant netflix is getting a lot of attention. here's abc's rebecca jarvis. >> i feel good to be on the offensive. >> reporter: it's the battle of benefits. netflix, the online streaming company behind "house of cards," now rocking the corporate world. announcing a whole year of pait leave for new moms and dads. and just hours later, microsoft coming in with its own offer,