After a wild season of alien abductions, space adventures, and, of course, time travel, the season finale of DC's Legends of Tomorrow arrives next week and now, The CW has released a preview. The episode, The Fungus Amongus" is the fifteenth episode of the show's sixth season and will air on Sunday, September 5th and will see the Legends fight back against Bishop's (Raffi Barsoumian) plan and will see Sara (Caity Lotz) and Ava (Jes Macallan) even willing to break some of the Legends' rules in order to do so.