The Gorilla Experiment

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.

My Thoughts

Guest Stars

Special appearances in this episode.

Guest Stars

Melissa Rauch

Bernadette Rostenkowski

Carol Ann Susi

Debbie Wolowitz (voice)

Crew

Episode-specific crew credits.

Mark Cendrowski

Director

Directing

Chuck Lorre

Story

Writing

Steve Holland

Story

Writing

Steven Molaro

Teleplay

Writing

Maria Ferrari

Teleplay

Writing

Julie Fleischer

Script Supervisor

Directing

Bill Prady

Teleplay

Writing

Richard A. Rosenstock

Story

Writing

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