8 Times The Walking Dead Cast Appeared On The X-Files

4. Xander Berkeley

His Role On The Walking Dead: Berkeley will be turning up in the upcoming sixth season of the show as a narcissistic character armed with a huge ego, a need for self-preservation and charm that has allowed him to stay in a role of power. While the character's name hasn't been revealed yet, the description and fact that his contract reportedly has a series regular option for the seventh season has led many fans to speculate that he will be playing Gregory, the leader of the Hilltop community from the comics. His Role On The X-Files: The actor appeared in the first season episode "Ice" as Dr. Hodge, a member of the investigative party dispatched to Alaska in response to the deaths of an entire team of researchers. When they discover the presence of parasitic worms in the outpost responsible for infecting hosts and driving them insane, paranoia set in, with Hodge coming to accuse Mulder of the murder of one of their own before ultimately realizing that their toxicologist was the one infected and responsible.