The Castle star Nathan Fillion will play himself in the upcoming episode of The Big Bang Theory.
The 43-year-old will be seen on the popular sitcom's February 19 episode, reports ew.com.
Fillion would be set sitting at a restaurant and being spotted by Raj (played by Kunal Nayyar) and Leonard (played by Johnny Galecki). The two then debate if it's really Fillian or not, and whether or not they should ask him for a photograph.
Fillion is well known for his role in the television series Firefly.