Holly Marie Combs was pregnant with her first child during this season & they wrote it into the script.
Rose McGowan's hair is darker again in this episode after being red ever since the beginning of the previous season.
The title refers to the television series and movie entitled The Courtship of Eddie's Father (1963).
The building used for Paddy's Pub in Its Always Sunny In Phillidelpia can be seen towards the beginning of the episode. It's located in the arts district of LA, known as the Nate Starkman Building.