It's Always Sunny in Philadelphia: Season 3, Episode 4

3 - 4: The Gang Gets Held Hostage

The McPoyles invade Paddy's and take the gang hostage, demanding $100,000, a gassed-up boat and a reversible Planet Hollywood jacket. Meanwhile, Frank is crawling through the ductwork above Paddy's, searching for his will, when Liam McPoyle turns up the heat.