[4] He does battle with nemeses such as Daedalus, an evil wizard who is the chief villain (sometimes accompanied by his pet cat Dydo).

Other villains include Wilhelmine the Sea Witch (accompanied by her pet bird Elvira) and Murtis, who is invulnerable because he wears an iron helmet known as the Mask of Vulcan.

In addition to the ring, later episodes added new equipment for Hercules and his friends to use, such as a "moonstone beam" in his belt and an invulnerable sword and shield.

Adventure Cartoon Productions made The Mighty Hercules in connection with Trans-Lux Television, the same company that later brought the Japanese anime series Speed Racer to audiences in the United States.

The animation for the sequence of Hercules putting on and charging up his magic ring also changed subtly along with the voices.

The episodes "The Minotaur" and "The Chair of Forgetfulness" provide good examples of the first set of voices and the first version of the ring sequence, while the episodes "The Nemean Lion" and "The Chameleon Creature" are good examples of the second set of voices and later ring sequence.

The Mighty Hercules features a theme song sung by Johnny Nash, the American reggae singer-songwriter best known for 1956's "A Very Special Love" and 1972's "I Can See Clearly Now".

[citation needed] The transformative "ring anthem" frequently used as Hercules slips on his magic ring, along with several bridges of music used throughout the episodes, were taken from the 1954 film The Black Shield of Falworth, with the music credited to Joseph Gershenson but actually composed by Hans J. Salter, Herman Stein, and Frank Skinner, the longtime in-house film composer for Universal Studios.

[citation needed] The version that aired on the Canadian network Teletoon Retro used the original Nash theme music.

[citation needed] In 2009, the Canadian jazz musician John Stetch covered the theme song from The Mighty Hercules on his album TV Trio.