It's a life most of us have only seen on the big screen -- C.I.A. spies trekking through foreign countries on covert assignments, trying to never leave a fingerprint behind.
But it's a life Bob and Dayna Baer, a real life Mr. & Mrs. Smith, know very well and this week on "Brian Ross Investigates" they discuss the new book they co-wrote that details their former lives undercover and how they met and fell in love.
"We got so many questions over the years about what was it like, what did we tell our friends or our family, or what could we tell our friends or our family," Dayna Baer explains to ABC News Chief Investigative Correspondent Brian Ross when asked why they decided to write the book, "The Company We Keep."
CLICK HERE to read an excerpt of the book.
Bob Baer, a former ABC News consultant, and Dayna, who has only recently revealed her identity, first met in Sarajevo in the middle of a war zone, where they didn't even know each other's real last names for months while they worked side by side. But the dangerous work they did, coupled with alienation from the outside world, created a unique relationship between them and love soon blossomed.
"You have to rely on each other, so there is a bond that forms probably a little bit stronger than you have with people outside the CIA," Dayna Baer says. They both eventually left the CIA to be together and start a family, adopting a daughter from Pakistan, now named Khyber, who had been abandoned at a church outside Islamabad after her mother died.
Asked if he'd tell his daughter about his undercover past, Bob Baer says, "Maybe she'll go into the CIA."
CLICK HERE to buy the book.
The Baers also answer viewer questions submitted through Twitter on "Brian Ross Investigates," including how they were trained to be professional liars and what their most exciting missions were.
CLICK HERE to watch the interview.
Also on Friday's show, see a previously unaired extended interview with Libyan Ambassador Ibrahim Dabbashi, who was the first Libyan diplomat to come out against embattled leader Moammar Ghadafi, although he remains the number two man at the country's United Nations mission in New York.
The ABC News Investigative Team also updates the "Thrill Kill" case, a story first aired last year with allegations that young American soldiers accused of being part of a kill team that murdered innocent Afghan civilians for fun.
"Brian Ross Investigates" is a weekly 30-minute investigate news magazine show that features exclusive interviews, undercover videos and extended investigations and story updates, airing every Friday on Hulu.com -- CLICK HERE to watch the full episodes -- and ABC News Now, the network's 24-hour news channel available throughout the U.S. and Europe, at 1:36pm. Each show is also available on mobile devices, including the iPhone and iPad.
Viewers can submit videos and personal thoughts on controversial issues and current topics through Facebook and Twitter, including the "Skype Gripe" segment, in which viewers are invited to interact with Ross about recent investigations.
To join in on the discussion and be part of the show, follow Brian Ross on Twitter at @BrianRoss, the Investigative Team at @ABCNewsBlotter, and on Facebook (ABC News Investigative Team).