Supergirl 2x15 "Exodus" Season 2 Episode 15 Sneak Peek - As Alex (Chyler Leigh) searches for Jeremiah (guest star Dean Cain) and Kara (Melissa Benoist) investigates a series of alien kidnappings, the sisters realize they must break the rules to foil a new Cadmus plot. In an effort to get Snapper Carr (guest star Ian Gomez) to run a story that would help her stop Cadmus, Kara agrees to set up an interview between Snapper and Supergirl. Michael Allowitz directed the episode written by Paula Yoo & Eric Carrasco (#215). Original airdate 362017.