15 Times Sons Of Anarchy Cast Were On The X-Files

15. Mitch Pileggi

His Role On Sons Of Anarchy: Pileggi portrayed Ernest Darby, the leader of the White supremacist group the Nordics. In the first two seasons, he and his group's drug dealing activities constantly kept them at odds with SAMCRO, with Darby even teaming up with Ethan Zobelle, AJ Weston, and LOAN, though he was eventually double-crossed. After making a few more appearances in season three, Darby only returned one further time in season six - married to a Mexican woman and attempting to move away from his terrible past - to help the Sons wipe out the Neo-Nazi group that had attacked Unser.

His Role On The X-Files: Easily the most obvious entry on this list, he played Assistant Director Walter Skinner throughout all nine seasons of the series and both movies. The fan favorite character is also returning alongside Mulder and Scully in the upcoming revival.