Ringer: Season 1, Episode 21

1 - 21: It's Called Improvising, Bitch!

Catherine's plan to drive Andrew and Bridget, posing as Siobhan, apart unravels. Agent Machado discovers who wanted to kill Siobhan all along and rushes to intercept the killer before it is too late. Meanwhile, Siobhan's plan to help Henry backfires when the main witness suddenly dies.