The Imitation Perturbation

EPISODE:

Episode Info

When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocked that Penny doesn't remember their first kiss.

Cast

Kaley Cuoco
as Penny
Johnny Galecki
as Leonard Hofstadter
Jim Parsons
as Sheldon Cooper
Simon Helberg
as Howard Wolowitz
Kunal Nayyar
as Rajesh Koothrappali
Melissa Rauch
as Bernadette Rostenkowski
Mayim Bialik
as Amy Farrah Fowler
David Theune
as Dr. Graybel
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The Imitation Perturbation Photos