Alex Krycek

Alex Krycek is a fictional character in the Fox science fiction-supernatural television series The X-Files. Alex Krycek is played by Nicholas Lea. He is initially introduced in the second season as a partner for FBI Special Agent Fox Mulder in the absence of his previous partner, Dana Scully. As the show progressed, Krycek grew to become one of the show's primary antagonists, appearing subsequently in every season until Season 9. Krycek's machinations frequently pitted him against Mulder, with whom he shared a complicated relationship. He was variously seen as either a henchman or enemy of the show's primary antagonist, The Smoking Man, changing his allegiance when the situation suited him best.