Season 5 · Episode 21 · Overall #108
The Hawking Excitation
Aired April 5, 2012 Directed by Mark Cendrowski Written by Story by : Bill Prady & Steven Molaro & Steve Holland | Teleplay by : Chuck Lorre & Eric Kaplan & Maria Ferrari
About This Episode
Howard needs Sheldon to provide a recommendation for his space mission and Sheldon leverages the situation. Stephen Hawking makes a memorable appearance.
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