The Big Bang Theory - E4 - TVGuide.Co.Uk

Citation: The Big Bang Theory - E4 - TVGuide.co.uk

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• Penny feels threatened when a sexy actress moves into the apartment building.

• Penny senses that her friends are being manipulated by the new arrival.

• The new arrival lands a role in TV series CSI.

• The show stars Kaley Cuoco, Valerie Azlynn, Johnny Galecki, and Simon Helberg.

• The episode is from season 4 of The Big Bang Theory.

• The episode title is "The Celebration Experiment".

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