At the world premiere of legal drama series "All's Fair," actor and recording artist Jessica Simpson explains why she's back in showbusiness after raising three kids. | AP

Jessica Chobot returns 40 years after Theresa Ann Bier's disappearance to revisit the chilling case. With justice still missing and many questions left unanswered, she's determined to find out what really happened to Theresa. Tune in to limited series #BigfootTookHer Oct 29 starting at 8P on Discovery. | Discovery