The Big Bran Hypothesis

Summary
Penny asks Leonard to sign for a piece furniture while she is out. But when he puts it into her apartment, Sheldon sees what a mess it is and insists on tidying up. Penny returns soon after and so Sheldon breaks in at night to tidy.

Critics
"A really enjoyable follow up to the pilot. Sheldon’s convictions create a plausible and funny source of conflict for the newly forming group of friends. The writers work really hard here to build a credible world for the characters which feels real and is funny. Long may it continue." - The TV Critic's Review