The only Batman TV or film adaptation in which Alfred does not make at least one single appearance.
The Riddler was shown in the opening credits but never appeared in any of the episodes. This was because Hanna-Barbera Productions held the rights to use The Riddler, Scarecrow, and Solomon Grundy for O Desafio dos Super Amigos (1973).
The series aired at the same time as O Desafio dos Super Amigos (1973) which featured Batman and Robin as main characters. O Desafio dos Super Amigos (1973) was produced by Hanna-Barbera Productions and aired on American Broadcasting Company (ABC). This marks perhaps the only time in which a character was featured regularly on two different animated series at the same time, with each show produced by different companies and airing on rival networks.
Due to recently enacted standards regarding children's television, the Penguin was not depicted with his trade mark cigarette.
After several years of gimmicky personal appearances, including professional wrestling matches and being shot out of a cannon at a fair, Adam West was trying to distance himself from the character of Batman. But when he was offered the title role in this series, after briefly considering turning it down, decided he liked the association with the character and the genuine affection from fans. He maintained a regular association with Batman from this series until his death in 2017.