Steven Eckholdt, the actor who plays Alan's lawyer, Brad, also played a character named Mark in season 3 of "Friends". Charlie becomes jealous of Brad, as he thinks Chelsea is interested in him. The character, Mark, triggered a similar situation in "Friends" as he does in this episode.
Steven Eckholdt, who plays the lawyer, Brad, also had a small part in "The Wraith" (1986), which starred Charlie Sheen, although they didn't share any scenes.
Episode title spoken by Evelyn, to Charlie.