Here's a little Easter Egg for you: Nirvana drummer, Foo Fighters frontman, and all-around legend Dave Grohl appeared on The X-Files in a "blink and you'll miss him" cameo alongside his then-wife Jennifer Youngblood in the third season episode Pusher. Grohl, who has an interest in UFOs (clearly, given the name of his band), had already contributed a song to the show's early soundtrack album, Songs in the Key of X, which was released a month after this episode aired. The incredibly young looking Grohl would later call this his "acting debut." Foo Fighers would also contribute a second song to the show, for the franchise's first feature film: a re-recorded version of Walking After You from their second album, The Colour and the Shape.