"Prevent Helios and we prevent the beginning of The Fall. That was The Director's calculation that started this whole thing."
―Grant MacLaren

Helios-685 is the sixth episode of the first season of Travelers. It premiered on November 21, 2016. It was written by Rebecca Hales and directed by Helen Shaver.


For a complete plot of Helios-685, go here.

The team tackles their primary mission: stop an event that could change the course of history.


Main Cast


  • Grant viewing Helios-685's projected path. Text displays “Estimated casualties averted: approx. 91.462,000”
  • Trevor working on the anti=matter containment unit