The Financial Permeability

Summary
Penny is short on her rent money and so Sheldon lends her some of his spare cash. She feels guilty about not paying it back and still can’t pay her electricity bills. Leonard tries to help and discovers that she paid her ex-boyfriend Kurt’s police fine. Leonard confronts Kurt and eventually he gives the money back. But he doesn’t tell Penny why and she ends up on a date with him while Leonard is left only with Sheldon’s admiration.

Critics
"The Big Bang Theory feels like a show totally happy with who it is and where it is. The dialogue is crisp and silly in equal measure. Everything flows from the well established geeky world which the guys live in and well performed. The show is reliably funny, usually enjoyable and clearly capable of so much more." - The TV Critic's Review