The The Lizard-Spock Expansion

Summary
Howard picks up a girl at a club and takes her to the Mars Rover lab at the university. When they crash the Rover they have to wipe all the data and hope they don’t get in trouble. Leonard takes Stephanie home and ends up dating her. When Howard finds out he is mad. But when they offer him a date with Stephanie’s roommate he forgives them.

Critics
"I really want to like this episode, the comedy is good, the focus is on Leonard for once but unfortunately I can’t. The writers lack of thought it annoying and again they limit the show. There seems to be a desire from the producers to keep the show from evolving. That’s a loss for the viewers because this show has the potential to be so much more." - The TV Critic's Review