"SUNDAY 20/20: THE SIXTH SENSE"

Special Edition of "20/20" Premieres Sunday, August 21 on ABC

When nothing adds up and a gut feeling is all you have, forget about your five senses... what you really need is the sixth sense. "SUNDAY 20/20: The Sixth Sense," which features stories of extraordinary instinct that uncovers the truth, premieres AUGUST 21 (9:00-11:00 p.m., ET) on the ABC Television Network. The special edition of "20/20" is scheduled to air the following Sundays from 9:00-11:00 p.m., ET:

Sunday, August 21

"Letters from the Grave" -- Two young mothers - one in Arizona and one in Wisconsin - both found dead under mysterious circumstances... But the clues to solving these cases are found in the stunning letters written by the women themselves just days before their deaths. Did they sense their time on earth was coming to an end? Jay Schadler reports. (OAD: 2/29/08 and 4/3/09)

Sunday, August 28

Where else but on the internet can you fall in love with complete strangers who have lied about their real identity? "20/20: The Sixth Sense" reports on two romances based on lies, both with explosive endings. "20/20" reveals the inside story of the controversial movie "Catfish." Jay Schadler follows the story of Nev Schulman, a 24-year-old NYC photographer who becomes entangled in an intriguing internet relationship with a Michigan family. On Facebook, Nev befriends an 8-year-old art prodigy, her mother, and her beautiful older sister, Megan. Nev's filmmaker brother, Ariel, and friend Henry Joost document the budding love affair between Nev and Megan, and soon embark on a road trip to discover the shocking truth about the family. "20/20" examines the unraveling of a romance and the mysterious source of the online deception. Jay Schadler reports. (OAD: 10/8/10) Plus: "20/20" reports on a real-life online murder mystery. A chance encounter in an online chat room leads to romance between a beautiful 18-year-old girl and a handsome young marine. But what she doesn't know is that her "sweet sexy marine" is actually a 46-year-old married man. And before it's over, passion will turn to jealousy, a love triangle... and murder.?? "20/20" investigates a mystery where nothing is what it seems. Jim Avila reports.? (OAD: 3/19/10)

Sunday, September 4

A young, blond woman is discovered on the side of the road, beaten, naked and left for dead. When she regains consciousness, her statements to police are contradictory, confusing, even suspicious. Surveillance cameras capture her entering the elevator at the Miami hotel where she'd been staying, but she's never seen leaving again. There's no shortage of suspects - an older man who calls himself a "friend" of the victim but who'd been arrested for an act of domestic violence against her; a hotel manager whose interests in the victim were less than professional; but soon all the leads run cold. As the cops run out of theories, they agree to let a colorful private investigator named Ken Brennan run with the case. The mystery becomes an obsession for Brennan, but eventually he comes up with a theory so outlandish it sounds like a joke - until DNA proves him right. Chris Cuomo reports. (OAD: 4/1/11)

September 18

The Wrong Turn: The Kati Kim Story: Like a scene from a chilling horror movie, a young family is trapped in a snowstorm in isolated woods miles away from any help and surrounded by grizzly bears. Snowed in and unable to move their vehicle, the Kims spend nine long days stranded in south-western Oregon's remote bear infested wilderness, some 33 miles from the nearest town. Rationing their meager food supplies, surviving off local berries and spending their nights in sub-zero temperatures, the frightened family resort to burning their possessions in an attempt to signal help - and stay alive. Reported missing by friends and family, the Kims' strange disappearance makes national news. How did the Kims survive such an extreme environment? What clues did the family leave the heroic search teams? And what happened when dad, James Kim, decided to leave the car and looks for help? After years of silence and with an exclusive, never-before-seen interview, mom and survivor Kati Kim tells her story and gives us a heartfelt insight into how a family Christmas vacation ended in a struggle for survival, an intensive search and rescue effort - and a family tragedy. Jay Schadler reports. (OAD: 2/11/11)

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