Like A 'Bad Dream': How Rising 'Smallville' Actress Allison Mack Wound Up In A Menacing Sex Cult — And Behind Bars

"Smallville" actress Allison Mack seemed to have everything going for her, but she told her family something was missing in her life. She joined NXIVM, which billed itself as a self-improvement group but was in reality a sex cult that brainwashed, humiliated and abused its members.

Mack rose through NXIVM's ranks to stand beside its monstrous leader, Keith Raniere, until the law finally caught up with her and the cult.