TWO HOURS OF "20/20" FRIDAY, NOVEMBER 11

"20/20: Caught in the Act" Airs 9:00-10:00 p.m., ET;

"20/20" - Small Town Scandal Airs 10:00-11:00 p.m., ET

Behind every great video, there is a great story - and "20/20" has the tales behind the tapes. "20/20: Caught in the Act" airs FRIDAY, NOVEMBER 11 (9:00-10:00 p.m., ET) on the ABC Television Network. Reports include:

Store Clerks Fighting Back: Internet video sites are loaded with surveillance camera scenes of armed robberies caught in the act. Some of those videos show clerks and even customers fighting back against the bad guys. It's a storyline as old as cops & robbers, and everyone loves a hero. But what are the real consequences when victims attack? Deborah Roberts digs into the aftermath of two dramatic and violent armed robberies.

Bank Robbers: John Berman looks at the most scary, clever, absurd and hilarious bank robbery videos, with insight and commentary from none other than a former bank robber.

TV Reporters: Television news reporters have their share of bleeps, bloopers and blunders� and when they're caught live on camera, they can change one's career and give the rest of us a big laugh. Chris Cuomo reports.

Colorado Killer: Travis Forbes claimed to be the last person to help Kenia Monge as she drunkenly stumbled away from a downtown nightclub. But his story unraveled when surveillance cameras showed him wheeling a sealed cooler into his workplace, putting on latex gloves, and turning off the security system. But it would take another terrifying attack months later before detectives could lock him away for good. Cuomo reports.

Cops Caught Drinking: Undercover detectives charge Hooters waitress Illysa Medina with serving alcohol to an obviously intoxicated person. But when she and her lawyer examine the restaurant's surveillance tapes, they notice something different - the cops themselves are caught drinking. Cuomo reports.

Airing on "20/20" at 10:00 p.m., ET:

Can the grief of losing a child be to blame for the uncharacteristic and shocking actions of a once prominent small town mayor and wife of the popular high school principal? Linda and Kevin Lusk were one of the most respected couples in Prosser, Washington, until the unimaginable happened: Linda was accused of sexting and having inappropriate physical contact with a 14-year-old high school student who also happened to be her daughter's ex-boyfriend. It became a small town scandal that spread like wildfire. After a police investigation was launched, followed by a media firestorm, the once golden couple was under siege. Linda admits that what started out as a maternal and nurturing relationship with the boy, nicknamed Bubba, turned terribly wrong after his friends dared him to make Ms. Lusk his first conquest. But how much of the story was true, how much was a high school kid's boastful "kiss and tell," and was Linda's depression, stemming from her grief of losing her disabled 15-year-old son, really to blame? "20/20" is behind the scenes with the family at the center of the small town scandal as they deal with the aftermath of a lunchtime encounter.

For the first time, all the key players - Linda and Kevin and their daughter, Karlie, Bubba Frank and his mother, and others - tell their stories to "20/20." Chris Cuomo's exclusive report airs FRIDAY, NOVEMBER 11 (10:00-11:00 p.m., ET) on ABC.

"20/20" is anchored by Elizabeth Vargas and Chris Cuomo. David Sloan is executive producer.