This is Frank Gorshin's 7th appearance as the Riddler. He was previously seen in Hi Diddle Riddle, Smack in the Middle, A Riddle a Day Keeps the Riddler Away, When the Rat's Away the Mice Will Play, The Ring of Wax & Give 'em the Axe. (edit) At the end of this story, only Robin has a cliffhanger, while Batman is somewhere else. (edit) Francis Xavier Bushman was a silent film star who was voted most popular leading man in American films from 1914-1917. On August 23, 1966, just a couple of months after his appearance in this episode of Batman, he passed away of a heart attack resulting from a fall. He was 83. (edit) Based on "The Joker's Comedy Capers!" from Detective Comics #341 (July 1965) by John Broome. (edit)

(The Riddler has strapped Robin to a conveyor belt leading to a buzz saw)
Riddler: Riddle me this, my criminal crew! When does the Boy Wonder rhyme with "bubble"?
Molly: When he's in trouble?
Ridder: Wrong! When he's double! (laughing fiendishly) Split in two halves, right down the middle! (edit)

Goof: Notice during the party fight, Batman calls out to the crowd to stop fighting while his lips are not moving. (edit)

Von Bloheim refers to the Batman as Die Fledermaus, German for The Bat or literally; The Flutter-mouse, a comic operetta composed Johann Strauss II. (edit) Riddler's henchmen have names that refer to silent film characters or people of that era. Van Bloheim is a take-off on director-actor Erich Von Stroheim, CB refers to Cecil B. De Mille and Pauline from the 1914 movie The Perils of Pauline.
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