Aired: February 26, 2016 | Season: 9 | Episode: 17
Overview
Runtime: 19m
Directed by: Mark Cendrowski
Written by: Steve Holland, Steven Molaro, Tara Hernandez
Guest stars: Adam West, Christine Baranski, John Ross Bowie, Sara Gilbert, Stephen Hawking, Wil Wheaton
Description
After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.
Season 9 Episode 16
The Positive Negative Reaction
Season 9 Episode 18
The Application Deterioration