Alan and Walker must battle the Scythe to save the world from disaster on the season finale of Helix. "Dans L'ombre" is the 13th episode of the show's first season.
Alan and Julia find an abandoned satellite station in their attempt to call for help on Helix. "Fushigi" is the tenth episode of the show's first season.
When Sutton's real relationship with Hatake is revealed, Walker is held prisoner on Helix. "Bloodline" is the eighth episode of the show's first season.