BARBARA WALTERS' INTERVIEW WITH TERRI IRWIN, WIDOW OF THE CROCODILE HUNTER, A YEAR AFTER HIS SHOCKING DEATH, ON ABC NEWS' "20/20," FRIDAY, NOVEMBER 2

Plus: Jim Avila's Exclusive Jailhouse Interview with a Man Accused of Murdering His Estranged Wife

And: John Stossel Says "ENOUGH!" to Fake Doo Wop Groups -- Is it a Sophisticated Form of Identity Theft?

It's been just over a year since Crocodile Hunter Steve Irwin died from the barb of a stingray. His widow, Terri Irwin, speaks candidly to Barbara Walters about life without him, as well as her determination to carry on the Crocodile Hunter's animal conservation work - including her first croc-hunting mission - and whether or not she is exploiting her children by letting them be on TV. The in-depth interview airs on "20/20" FRIDAY, NOVEMBER 2 (10:02-11:00 p.m., ET) on the ABC Television Network.

Plus: Where is Nina Reiser? The 31-year-old mother of two who is a doctor with movie star looks simply vanished a year ago Labor Day in Oakland, California. Was she murdered? Is she still alive? In an exclusive jailhouse interview with Jim Avila, Nina's estranged husband, Hans, a computer geek/genius, speaks out for the first time about being charged with her murder. Avila interviews Reiser's best friend, Ellen, and Hans' father, and also travels to Russia, where Nina was born, to speak to her mother.

And: John Stossel says "ENOUGH!" You know the music... the doo wop era of the '50s and '60s gave us so many famous songs and famous groups, including The Coasters, The Drifters and The Platters. They continue to live on with performances nationwide. But wait - the majority of these doo wop groups performing today have no members of the original 1950s and 1960s recording groups. There are still surviving members of these groups performing, but they're being underbid by the fakes, who deprive them of jobs. Consumers who want to pay tribute to the groups they love are cheated too. Stossel talks to Jon Bauman ("Bowzer" of Sha Na Na), who is working through the Vocal Group Hall of Fame to pass Truth in Music laws to remedy this. Eighteen states have passed these laws so far. "20/20" also accompanies real Drifter Charlie Thomas as he confronts the members of a bogus Drifters group at a New York City show.

"20/20" is anchored by Elizabeth Vargas and John Stossel. David Sloan is executive producer.