* DescendedCreator: Series co-creator Bill Hanna provided Tom's iconic "leather-lunged" screams.
* InMemoriam: ''Tom and Jerry: Return to Oz'' was dedicated to the memory of Creator/JoeAlaskey, who voiced the Wizard of Oz, Butch, and Droopy and died several months before the film was released.
* KeepCirculatingTheTapes: "Casanova Cat" and "Mouse Cleaning", which weren't present on the Spotlight Collections. They are available on VHS and laserdisc, though.
** And the later short "The Mansion Cat" that's never been on any home media.
* MoneyDearBoy: Reportedly, Gene Deitch hated ''Tom & Jerry'' and this was the only reason he agreed to direct shorts.
* NamesTheSame: There was an earlier ''Tom & Jerry'' cartoon series in the early 1930s by Creator/VanBeurenStudios featuring a Mutt & Jeff-type duo.
* TheOtherDarrin:
** Spike was originally voiced by Billy Bletcher, known for his booming baritone voice. Starting with the Tom and Jerry short "Love That Pup," Spike was voiced by Daws Butler using a Jimmy Durante impersonation.
** The Creator/ChuckJones era featured voice legend Mel Blanc providing the voices of Tom and Jerry (with June Foray also providing some voice work of her own)
** While it's also a role reprisal from the Sherlock Holmes movie, Creator/JeffBergman replaces Joe Alaskey as the voice of Droopy in the DVD movie line due to the latter's death.
* PosthumousCredit: Creator/JoeAlaskey, the voice of The Wizard of Oz, Butch, and Droopy in both ''Tom and Jerry: The Wizard of Oz'' and ''Tom and Jerry: Return to Oz''', passed away several months before the latter film was released.
* RecycledScript: "Busy Buddies" was later remade as the final ''Tom & Jerry'' cartoon "Tot Watchers"; while the type of gags were different, the basic premise (Jeannie the babysitter is talking on the phone instead of watching the baby, while Tom & Jerry have to make sure the baby doesn't get into any harm) is the same.
** The very first T&J short "Puss Gets the Boot" was later remade as "Mouse Cleaning". In both cartoons, the black mammy-type maid warns Tom not to make a mess or out he goes. Naturally, Jerry tries to make the biggest mess possible, while Tom tries to frantically to clean it up. The main difference between the two films is that "Mouse Cleaning" is, befitting the cartoons of the period, DenserAndWackier, something out of a Creator/TexAvery cartoon of the same period.
** A couple shorts were re-animated in the new Cinemascope aspect ratio, but had virtually identical plots and gags: "Hatch Up Your Troubles" was redrawn as "The Egg and Jerry", and "The Little Orphan" was redrawn as "Feedin' the Kiddie".
* TheShelfOfMovieLanguishment: Tom and Jerry: Golden Collection vol. 2. Hoo boy... where to begin. The set was slated for release in 2013; everything about the set was done: The cartoons had been restored, the liner notes had been written, and (presumably) the discs had been pressed. But before its release, fans reacted to the press release of the set's contents with disgust: They had skipped over "Casanova Cat" and "Mouse Cleaning" ''again''! The reaction was understandable, considering this line was meant for collectors, who recognize the historical significance of the shorts (warts and all), not the kid/family audience, and it was going through the filmography in order, so omissions more easily stand out. Warner had previously confirmed that "Mouse Cleaning" would be included, and that they were restoring it from the original negative, and Jerry Beck confirmed that he wrote liner notes for it. This led to some fans boycotting this set before it was even released, including leaving one-star reviews on Amazon. Unfortunately, this bad publicity for Warner Bros. had the opposite effect of what was intended: Instead of WB delaying the release, going back and including these two cartoons, they simply postponed the set indefinitely. So instead of getting a set that admittedly would've been incomplete, we got nothing. Supposedly Warner wants to release the set with the cartoons (most likely with disclaimers), but there's a higher-up that refuses to release them while she works there.
* WhatCouldHaveBeen
** There were numerous stories on the drawing board that didn't make it to the screen. One cartoon, "Little Bird-Mouse" (thought up before the MGM cartoon studio closed), ended up being rewritten as a ''[[WesternAnimation/PixieDixieAndMrJinks Pixie & Dixie]]'' short at Hanna & Barbera's own studio.
** Less than a week before MGM's animation unit closed, a studio messenger boy named Creator/JackNicholson (yes, THAT Jack Nicholson) was interviewed for a job as a cleanup artist.
----