Season 4 · Episode 3 · Overall #66
The Zazzy Substitution
Aired October 7, 2010 Directed by Mark Cendrowski Written by Story by : Chuck Lorre & Bill Prady & Jim Reynolds | Teleplay by : Lee Aronsohn & Steven Molaro & Maria Ferrari
About This Episode
Sheldon replaces Penny with 25 cats after she and Leonard split. Amy Farrah Fowler is mentioned and will soon change everything.
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