Legion premiere date and new trailer revealed FX has revealed the Legion premiere date as well as a new trailer for the highly-anticipated new drama series from Noah Hawley, which will launch on Wednesday, February 8 at 10 PM ET/PT. Check out the new trailer below! Hawley serves as Executive Producer, along with Lauren Shuler Donner, Bryan Singer, Simon Kinberg, Jeph Loeb, Jim Chory and John Cameron.