Nathan Fillion is set to cameo as himself in an upcoming episode of The Big Bang Theory, EW has learned exclusively.
The Castle star—whose geek cred includes Firefly, Buffy the Vampire Slayer, and Dr. Horrible’s Sing-Along Blog—will appear in the Feb. 19 episode, in which Raj (Kunal Nayyar) and Leonard (Johnny Galecki) see him sitting at a restaurant and debate whether or not it’s really him and whether or not they should ask him for a picture.
The Castle star—whose geek cred includes Firefly, Buffy the Vampire Slayer, and Dr. Horrible’s Sing-Along Blog—will appear in the Feb. 19 episode, in which Raj (Kunal Nayyar) and Leonard (Johnny Galecki) see him sitting at a restaurant and debate whether or not it’s really him and whether or not they should ask him for a picture.
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