TL;DR: “20/20” kicks off its new season tonight, Friday, Sept. 25, at 9 p.m. ET on ABC with “The Salem Strangler,” a two-hour investigation into the 1986 murder of Salem State student Claire Gravel.

A new sneak peek at 20/20 Season 49, Episode 3 takes viewers inside a creepy abandoned house where a woman was found dead.

A young woman murdered. 20/20 takes you inside the stunning true crime case filled with dramatic twists and turns, premiering Friday, Oct. 24th at 9/8c on ABC Network. Stream on Disney+ and Hulu.