The Big Bang Theory - Season 9 Episode 17
After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.
- Genre: Comedy
- Studio: CBS
- Keyword: geek, nerd, friends, scientist, sitcom
- Cast: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Melissa Rauch
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