After it was revealed that he was one of the male clones of Project Castor in the season 2 finale Orphan Black, it's sort of ridiculous to think that Mark was slated to die after just six episodes. Co-Creator John Fawcett explained that Ari Millen was just too good to kill off. "He just blew our minds over and over with all of these great scenes, and we just saw all this great potential in that character," Fawcett told us, "It really wasn't too much later that we decided to definitely not kill him and in fact use him as the male clone that we introduced."