VIDEO: Jeremy London Relives Kidnapping To Skeptical 'Celebrity Rehab' Castmates

London told a captive audience of Eric Roberts, Leif Garrett and Janice Dickinson how he was held at gunpoint by a pair of  Good  Samaritans-turned-sinners after they helped him out with a flat  tire. London said he was forced in the backseat at gunpoint by the men, who popped pills and smoked drugs, while forcing him to do the same.

Asked about why his  mother and twin brother believed that he was lying, London said, "They're just nasty people."

Some of his  peers on the show seemed just as skeptical  -- most notably  Leif Garrett   -- a heroin addict -- who seemed to  roll his eyes  as London told his story.  Eric Roberts, however, seemed sympathetic , saying, "Wow dude, what a f *****  up story."

During another part of the premiere episodes, London talked about abuse he suffered as a child and told how one of his brothers and a sister were killed in separate car accidents.