When keeping the basement rodent-free drives Charlie to the brink, the gang decides to put the cynicism aside and throw a surprise party to cheer him up.
Before Dee's baby arrives, The Gang tries to figure out who is the father by throwing a house party for all her former flings.
In an attempt to make their bar a local landmark, the gang visits the Philadelphia Historical Society and tells the story of how Paddy's Pub was responsible for cracking the Liberty Bell.
Jane pushes Brad to say "I love you" to his dad (Damon Wayans Sr.) At the hospital, Francis misconstrues Brad’s “I love you” as something wrong with him and has a heart attack that turns out only to be a panic attack. Dave and Alex become obsessed with playing with nerf guns. Penny meets a cute Italian and realizes that she can only speak Italian and understand him when she's drunk.
