Episode Title:
Undergrounded.
Episode Description:
After running out of money for a round of drinks, Peter learns that Joe and Cleveland have secret credit cards hidden from their wives, so he gets one himself one only to get caught and ends up getting grounded by Lois. Desperate to get out, he digs a hole out of the house that leads to the Drunken Clam. When a cave-in occurs, trapping Peter, Quagmire, Cleveland, and Joe, Peter's only hope for their freedom is for Brian to sell him out to Lois...
