High Quality Content by WIKIPEDIA articles! Alex Krycek is a fictional character in the long-running American science fiction show, The X-Files portrayed by Nicholas Lea. Initially introduced in the second season as a partner for main character Fox Mulder in the absence of his previous partner, Dana Scully, Krycek grew to become one of the show`s secondary antagonists, appearing in every subsequent season. 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 main antagonist, The Smoking Man, changing his allegiance whenever it best suited him.