16 TV characters who stuck around longer than expected 

Mark Rollins/ Rudy/ Miller/ Seth (Ari Millen), <em>Orphan Black</em>

Mark Rollins wasn’t originally intended to live past the sixth episode of season 2 — and then he turned out to be part of a military experiment with three other clones. Mark and his brothers Rudy, Miller, and Seth comprise Project Castor. The producers had planned all along to throw in a second set of male clones to combat Project Leda (Tatiana Maslany), and Millen’s talent convinced them that he was the guy for the job. —

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