In DC Comics, the Sandman was a hero during World War Two from Gotham City, not a villain
Narrator: Are our eyes deceiving us?? Batman quilted to a mattress!! Robin led away by the Abominable Sandman?? To be a sleeping pawn in Catwoman's cat-and-mouse game?? Wait on pins and needles!! You'll find out tomorrow!! Same Bat-Time, Same Bat-Channel!!!
This is the first appearance of the Sandman.
This is Julie Newmar's 7th appearance as Catwoman. She was previously seen in Season 1 episodes The Purr-Fect Crime & Better Luck Next Time and in season 2; Hot Off the Griddle, The Cat and the Fiddle, The Cat's Meow & The Bat's Kow Tow.
The Morpheus Mattress Factory is located on Derwin Alley, which is named for Batman assistant director Bill Derwin.
This is the first episode to feature team-ups of villains, following the pattern of the 1966 Batman movie, which featured four supervillains.
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