Trivia: During the scene where a drunken Uncle Billy walks home, a loud crashing sound is heard. The crashing sound was due to a crew member dropping a large tray of props. Thomas Mitchell quickly ad-libbed the line that he was all right. The crew member who dropped the tray was afraid he would be fired but instead director Frank Capra gave the crewman a ten dollar bonus for "improving the sound."
Trivia: When Porky is walking past the movie theatre, all of the film posters have moustaches drawn on them. You can see a poster of Warner Brothers star Bugs Bunny with a moustache at the ticket office.
Trivia: "Lonesome Lenny" was the final Screwy Squirrel cartoon made by MGM.
Trivia: When Tom woos the dog instead of the cat, he says the exact same dialogue he used in a previous Tom and Jerry cartoon, "Zoot Cat" (1944).
Trivia: When we see Daffy's silhouette in the door of Duck Twacy's office at the start of the dream sequence, the silhouette of Daffy briefly changes twice into Dick Tracy's silhouette.
Trivia: At the beginning of the cartoon, we see a long line of books at the book shop. The last book we see is entitled "Life and Times" by Bugs Bunny.
Trivia: As the gangsters speed by in their red car, you can see a billboard along the road advertising "Hotel Friz" - a reference to the director Friz Freleng.
Trivia: When Bugs is about to throw the baseball, on the fence behind him there is a sign hawking the Ross Co's "Finer Footwear for the Brats" - a reference to the Warner Brothers animator Virgil Ross.
Trivia: The "Evil Scientist" in this cartoon is a caricature of the actor Peter Lorre.
Trivia: At the start of the cartoon, we see animals changing seats in the theatre. This is re-used footage from a 1937 Warner Brothers cartoon, "She Was An Acrobat's Daughter."
Trivia: When Jerry finds Butch in the alley, we hear Butch humming a song. The song he is humming is "Over the Rainbow" from the film "The Wizard of Oz."