Trivia: With this film Bela Lugosi makes a trilogy playing the roles of Dracula, The Wolf Man and Frankenstein's monster.
Suggested correction: Technically, Lugosi did not play THE Wolf Man. He played A Wolf Man who infected Larry Talbot. He never appeared in werewolf makeup.
Trivia: This was the first cartoon to use "An MGM Tom and Jerry cartoon" end titles.
Trivia: When Claudin thinks his concerto has been stolen, he goes into a frenzy and attacks the music publisher. The publisher's assistant, Georgette, stops the attack by splashing a tray full of powerful etching acid into Claudin's face. Oddly, Claudin does not recoil when she throws the acid; rather, he leans forward, as if to ensure that it the liquid strikes him full in the face. Which is precisely what happened. To avoid having to shoot the messy scene more than once, we see actor Claude Rains deliberately leaning into the splash for a thorough dousing.
Trivia: Hitchcock's cameo comes relatively early in the film - he is playing bridge with a man and a woman on the train to Santa Rosa.
Trivia: Even though George Murphy plays Ronald Reagan's father in the movie, he was only 9 years older than Reagan.
Trivia: When Sleepy Lagoon is licking his lollipop towards the end of the cartoon, look at the wall and you can see a picture of the Warner Brothers animator and director Friz Freleng.
Trivia: The first Tom and Jerry cartoon to win an Academy Award for Best Animated Short Film.
Trivia: When Cecil Turtle shows Bugs Bunny a blueprint of his turtle shell, look at the bottom right and you can see the name "Michael Sasanoff." Sasanoff was Robert Clampett's layout artist.
Trivia: When Daffy Duck slides down the banister when Mr Meek is chasing him, he turns the statue at the bottom of the banister so that its spear will hit Mr Meek. When he does this, you can briefly see that the shield the statue is holding has the words "Buy Bonds" on it.