Jason King (TV series) the X-Men comics, the character of Jason Wyngarde (aka Mastermind) was partially inspired by Jason King and Peter Wyngarde. Mastermind had first appeared in the 1960s, but took on the appearance and identity of Jason Wyngarde in the build-up to the X-Men's first confrontation with the Hellfire Club in the late 1970s. Wyngarde had played the leader of another Hellfire club in "A Touch of Brimstone", an episode of the popular TV series "The Avengers", in which Diana Rigg appeared in a leather costume that Jean Grey adopted as the Hellfire Club's Black Queen. He is also one of the
A Town Called Mercy great drawl", and Adrian Scarborough, who he said "steals the whole episode". Browder was offered the role and gladly accepted; he was aware of the show as his children had watched it, and he also wanted to do a western. Whithouse was "thrilled" with Browder's performance, as it was how he imagined the character. "A Town Called Mercy" and the previous episode, "Dinosaurs on a Spaceship", were the first episodes to be produced for the seventh series, and both were directed by Saul Metzstein. The two episodes are Metzstein's first "Doctor Who" credits. Much of the episode was filmed around