A Superman movie marathon is disrupted when Penny asks the guys to sign for a package that may be delivered while sheâ€™s gone. But when the guys discover that the package is huge, they understand itâ€™s going to take some hard work to get it up all the stairs. When they finally do so and manage to get into Pennyâ€™s apartment with the spare key she gave Leonard, Sheldon is shocked about how messy her apartment is, and decides to clean it during the night while Penny is sleeping. However, when Penny wakes up, she is furious that they were in her apartment and Leonard is sad while she is angry at them.
Aired: 1 Oct 2007