Actor Tracey Walter, who plays the bum caught masturbating in the alley, played an uncredited role as "Street Urchin" in the movie Serpico (1973). In this episode, Charlie impersonates Al Pacino as Serpico. The term "street urchin" has also been used on the show to describe "Rickety Cricket".
The homeless guy who points his gun at Dee and Mac in the neighborhood they get dropped at by police is played by Rob McElhenney's father.
The 'what are you looking at dicknose?' T-shirt Mac wears is a homage to series director Jerry Levine and the film Teen Wolf (1985), in which Levine starred as Stiles, who wore the shirt in the film.
The cat, Agent Jack Bauer, is a Nebelung breed. They're known for their long gray fur and often green eyes.