Below is a complete Catalyst episode list that spans the show's entire TV run. Photos from the individual Catalyst episodes are listed along with the Catalyst episode names when available, as are the dates of the original airing of the episode. Catalyst episodes from every season can be seen below, along with fun facts about who directed the episodes, the stars of the and sometimes even information like shooting locations and original air dates. You can vote for any of these items, from “13/04/2006” to “11/08/2005.” Are you remembering a funny scene but can't think of the name that the Catalyst episode is from? Scroll below and you'll find what you're looking for.