Hi Diddle Riddle

Main Characters

 * Dynamic Duo
 * Batman (Bruce Wayne)
 * Robin (Richard Grayson)
 * Alfred Pennyworth
 * Gotham City Police Department
 * Commissioner James Gordon
 * Chief Miles O'Hara
 * Harriet Cooper

Villains

 * Molehill Mob
 * The Riddler
 * Harry
 * Molly

Other Characters

 * Bruce Wayne's Father
 * Bruce Wayne's Mother
 * Gideon Peale
 * Inspector Basch
 * Moldavian Prime Minister
 * Mr. Harris

Teams and Organizations

 * Gideon Peale Co.
 * Gotham City Police Department
 * Molehill Mob
 * What a Way to Go-Go

Species

 * Humans

Objects

 * Utility Belt
 * Bat-a-Rang
 * Bat-Cuffs
 * Bat-Hook
 * Laser Gun
 * Smoke Pellets
 * Bat-Computer
 * Bat-Phone
 * Batmobile
 * Batpoles
 * Bat Signal
 * Batsuit
 * Lighter Gun
 * Robin Suit
 * The Riddler's Cane
 * The Riddler's Dart Gun
 * The Riddler Suits
 * William Shakespeare Bust

Locations

 * Earth-66
 * Earth
 * Republic of Moldavia
 * United States of America
 * Gotham City
 * Gotham City Hall
 * Gotham City Police Headquarters
 * Gotham City World's Fair
 * Republic of Moldavia Pavilion
 * Molehill Mob Headquarters
 * Peale Art Gallery
 * Gideon Peale's Office
 * What a Way to Go-Go
 * Stately Wayne Manor
 * Batcave

Trivia

 * The opening footage of the Gotham City World's Fair is stock footage from the 1964/65 New York World's Fair.
 * After the Moldavian Prime Minister cuts into the Friendship Cake, he yells expletives in German rather than the native language of his county, Romanian.
 * This episode features the first appearance of the Batusi dance.