The title is a play on the 1955 song "See You Later, Alligator".
Daffy is an assistant to a Mexican scientist who has just built a time machine and gone to take a siesta. Daffy is annoyed by Speedy and his band playing music right outside the laboratory window so he hatches a plan to send him back in time to be rid of him. He lures the mouse into the machine by telling him it's a recording booth, but when he activates it he accidentally sends himself too and they both wind up in ancient Rome. Daffy yells at a passing gladiator who doesn't take kindly to it and promptly throws both of them into the Colosseum. Emperor Nero and the rest of the audience laugh as a lion also enters the arena. They fight back and forth until the lion flings them into Nero, breaking his fiddle. He chases them through the streets of Rome. Meanwhile, the scientist wakes up and reverses the time machine to bring Daffy and Speedy back, but he accidentally brings Nero to the present too. Nero doesn't know what he's going to do here, so Speedy lets him play fiddle in his band, outside the lab window.
- A slightly different arrangement of "The Merry-Go-Round Broke Down" by Bill Lava is only heard in this cartoon and in "3 Ring Wing-Ding".
- This was the last cartoon to feature Daffy and Speedy in the Golden Age of Animation (1928-69). In fact, it was the last such cartoon to feature any classic Looney Tunes character.
"See Ya Later Gladiator" has been widely considered by fans as the worst cartoon Warner Bros. has ever made (although some consider other W7-era shorts of the late-1960s to be worse). Criticisms include its inferior quality animation, off-model designs and artwork, William Lava's simplistic musical score, use of a limited selection of Hanna-Barbera sound effects, and uncharacteristic plot.[citation needed|date=]
|Speedy Gonzales Cartoons|
|1953||Cat-Tails for Two|
|1957||Tabasco Road • Gonzales' Tamales|
|1959||Mexicali Shmoes • Here Today, Gone Tamale|
|1960||West of the Pesos|
|1961||Cannery Woe • The Pied Piper of Guadalupe|
|1963||Mexican Cat Dance • Chili Weather|
|1964||A Message to Gracias • Nuts and Volts • Pancho's Hideaway • Road to Andalay|
|1965||It's Nice to Have a Mouse Around The House • Cats and Bruises • The Wild Chase • Moby Duck • Assault and Peppered • Well Worn Daffy • Chili Corn Corny • Go Go Amigo|
|1966||The Astroduck • Mucho Locos • Mexican Mousepiece • Daffy Rents • A-Haunting We Will Go • Snow Excuse • A Squeak in the Deep • Feather Finger • Swing Ding Amigo • A Taste of Catnip|
|1967||Daffy's Diner • Quacker Tracker • The Music Mice-Tro • The Spy Swatter • Speedy Ghost to Town • Rodent to Stardom • Go Away Stowaway • Fiesta Fiasco|
|1968||Skyscraper Caper • See Ya Later Gladiator|
|1979||Fright Before Christmas|
|1980||The Chocolate Chase|