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In a slew of programming news unveiled as part of Discovery Communication’s Television Critics Assn. panels on Thursday, Investigation Discovery announced an investigative crime series with Chris Hansen.

Hansen, who stirred controversy with his reporting tactics on Dateline NBC’s “To Catch a Predator” series targeting child molesters, will host “Killer Instincts With Chris Hansen,” which is slated to premiere later in 2015. The six-part series, produced by ITN Prods., brings Hansen into the field to take an in-depth look at America’s most horrific crimes.

“Chris and our partners at ITN Productions are working hard to produce an investigative newsmagazine that will draw in the viewer and make them feel as if they are right there in the moment – living every jolt and shock as the criminal drama unfolds,” said Henry Schleiff, group president of Investigation Discovery, American Heroes Channel, Destination America, Discovery Family Channel and Discovery Life Channel. “That is what Chris does best, and we look forward to what will unfold in ‘Killer Instinct.'”

Also announced at the Thursday panel in Pasadena was TLC’s upcoming reality series “My Big Fat Fabulous Life,” which stars YouTube personality Fat Girl, Whitney Thore, who became an overnight sensation when she courageously posted her video “A Fat Girl Dancing” in January 2014, after being diagnosed with Polycystic Ovarian Syndrome, which caused her to quickly gain more than 200 lbs. The series, premiering Jan. 13, will follow the ups and downs of Thore’s life in Greensboro, North Carolina. “My Big Fat Fabulous Life” is produced by Pilgrim Studios for TLC.

American Heroes Channel will welcome back Tom Brokaw for a one-hour special, “The Men Who Changed the World With Tom Brokaw,” which will premiere in early 2015. From NBC News’ Peacock Productions, the special will feature Brokaw’s interviews with historical newsmakers including George H.W. Bush, Nelson Mandela, Mikhail Gorbachev, Colin Powell and Bill Gates.

Discovery Communications also revealed the premiere date for transgender reality series “New Girls on the Block” (previously announced as “Those Girls”), from Conveyor Media in association with Reality Road. That series will debut on the rebranded Discovery Life Channel — currently named Discovery Fit & Heath — on April 2.

Science Channel announced the Feb. 7 premiere date for viral video-inspired series, “What Could Possibly Go Wrong?” which explores some of the internet’s most popular science experiment videos that resulted in giant fails. The 10-episode unscripted show is produced by Hoff Productions.

Discovery Communications, exclusively in partnership with TNA Entertainment, will premiere “Impact Wrestling” on Jan. 16 on Destination America. Professional wrestlers Chris Melendez and Ken Anderson along with TNA Wrestling president Dixie Carter presented the series at TCA.