"Tunguska" is a 1996 episode of The X-Files television series. It was the eighth episode broadcast in the show's fourth season. "Tunguska" was the first of a two part episode featuring the return of Alex Krycek and the agents coming into possession of a martian rock that contains alien life. Mulder travels to Russia with Krycek to find out more about the rock, where he is imprisoned in a Russian slave labor camp.



