CBS

Season 2: Episode 2 - Dennis's Birthday

Dennis's Birthday: ­Realizing how much she hates sleeping at Mike’s, Molly urges Mike to give up his place to move in with her, Mike isn’t so sure (they won’t step on the territory they did last year with this). Meanwhile, Peggy has been seeing Dennis and they decide to finally sleep together, however as they’re about to go to bed, he dies. Carl and Mike go to Peggy’s to help her deal but when Mike starts sorting out Dennis’ affairs, he realizes he doesn’t want that lonely existence and decides to move.