The couple who adopted Anna Lee, Quagmire's daughter, were the same couple seen standing at the reception desk of the adoption center when Peter, Joe and Quagmire first walked in. Possibly intentional, or perhaps using recycled characters.
Comedian Craig Gass voiced Al Pacino in a scene where he shouts all the machines are out of order in a slum laundromat. The scene ended up being deleted from the episode.