"Plaisir D'Amour" by Johann Martini, is sung by a chanteuse in the cabaret scene, but neither the song nor the singer are listed in the credits. The actress playing the singer was Julie Gregg, who had just played The Penguin's moll in the final two part episode of the first season.
The BatBoat was built especially for the film by the Glastron boat company. In exchange for their cooperation, the producers agreed to hold the film's world premiere in Austin, Texas, Glastron's headquarters.
The Penguin's line "We shall hang together, or most assuredly we shall all hang separately" was a humorous phrase spoken by Benjamin Franklin when he was in danger of being accused of high treason by his fellow delegates.
Julie Newmar (Catwoman in the TV series) does not appear in this film because she did not know about it and had signed to do another project. By the time she was informed, she could not get out of the other commitment in time to do this movie.
A follow up film was at one point considered. The film would have been released between seasons two and three, and would have been used to introduce Barbara Gordon/Bat Girl, and make use of a Batplane. Due to waning interest in the series during season two, which resulted in budget cuts, plans for a second film were scratched.
The movie was scheduled to premiere in Austin, Texas, on August 1st, 1966. The premiere was postponed, however, because earlier that same day a disturbed University of Texas student and former marine named Charles Whitman went to the observation deck of the school's clock tower and opened fire on the campus, killing 16 people and wounding 32 others before being shot to death himself by police.
Originally planned as the pilot film for the Batman (1966) TV series, the movie was instead produced between the show's first and second seasons. The producers took advantage of the larger budget to have a number of new Bat-gadgets constructed, such as the BatBoat.
At the end of the film, one of the United World delegates is seen banging his shoe on the table while yelling. This is a parody of Nikita Khrushchev's famous behavior during a debate in the United Nations General Assembly on October 12, 1960.
Scenes shot in the arch-criminals' headquarters lair were filmed in a dutch angle. This was intentional and was meant to show that the four villains (Catwoman, Penguin, Joker, and Riddler) were crooked.
In the final fight scene, a stuntman playing one of the villains' henchmen dove into the water and hit his head on a metal stud at the bottom of the pond. He was knocked unconscious and had to be rushed to the hospital.
The original trailer includes specially-shot footage of the 4 supervillains outlining their plans for the Dynamic Duo. Still frames from these sequences are visible when Batman and Commissioner Gordon watch a closed-circuit TV update on villains at large. The trailer also includes specially-shot footage of Batman and Robin addressing the audience about their first motion picture.
The promotional poster features Batman involved in a different costume from the TV series, with black mask, cape, gloves, boots and outerwear briefs but red tights instead gray. This is not an error, but a tribute to the original costume designed by Bob Kane to create Batman. Later it was revised by cartoonist Bill Finger, who changed the color of the tights from red to gray, giving him his definitive appearance for its first issue in Detective Comics dated in May, 1939.
The opening criminal lair, "Ye Olde Benbow Tavern" is an allusion to name of the tavern in which the the Robert Louis Stevenson novel "Treasure Island" begins, "Admiral Benbow Inn". Commodore Schmidlapp is abducted by the fiendish foursome. The next novel by R. L. Stevenson is "Kidnapped".
The voice of The President (Lyndon Johnson) was performed by Van Williams (uncredited), who would soon after star in The Green Hornet TV series, which was also produced by members of the Batman creative team.
Dick Grayson appears outside of his Robin persona only twice and very briefly in the film: first, at the very beginning, and later when Bruce returns to Wayne Manor after being abducted. Dick's only spoken lines are in the latter scene.
The movie was originally intended to be an introduction to the TV series. When the series wound up being produced and aired months ahead of schedule, the movie was made to cash in on the show's popularity.
The song played by the Salvation Army Band as Batman tries to dispose of the bomb is Bringing In The Sheaves, a popular Protestant Hymn. Various versions of the song can be heard in several other films and TV episodes.
The Penguin's line, "I have not yet begun to fight!" is a reference to John Paul Jones' famous response during the early phase of the Battle of Flamborough Head on September 23, 1779 to an inquiry by his opponent, Captain Richard Pearson of the Royal Navy ship HMS Serapis, as to whether he was surrendering his ship, the USS Bonhomme Richard.