 But when the day came that Thompson came to Vancouver, there had been some "misunderstanding" and he hadn't been told of the "crewcut", so the hairstyle seen in this episode was a "compromise" of sorts.Carter said that while "Colony" was a "crystallization of the series' mythology", it "came about inadvertently", following David Duchovny's suggestion to face an alien bounty hunter.Thus he sat with the actor and decided to also add Mulder's disappeared sister.