Leonard keeps an affair a secret from Sheldon, Howard and Raj.
- Directed by
- Mark Cendrowski
- Written by
- Chuck Lorre, Steven Molaro, Eric Kaplan
Guest stars
All episodes — Season 4
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S4 E1The Robotic Manipulation
Sep 23, 2010821 min
Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.
S4 E2The Cruciferous Vegetable Amplification
Sep 30, 20107.821 min
Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.
S4 E3The Zazzy Substitution
Oct 7, 20107.521 min
The guys are concerned as Sheldon searches for an alternative to human companionship.
S4 E4The Hot Troll Deviation
Oct 14, 20107.720 min
An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
S4 E5The Desperation Emanation
Oct 21, 20107.421 min
Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.
S4 E7The Apology Insufficiency
Nov 4, 20107.621 min
Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.