[1] Sinbad Jr. (voiced by Dal McKennon and Tim Matheson) is the teenage son of Sinbad, the famous sailor, and he travels the world in his single-masted sailboat seeking adventure and wrongs to the right, fighting such villains as the Bluto-like, big, black-bearded Blubbo and the mad doctor Rotcoddam ("mad doctor" spelt backwards).

Sinbad Jr. gained the strength of 50 men whenever he tightened his magic belt, causing the diamond-shaped buckle to flash like lightning and temporarily transform him into a mighty muscleman.

Sinbad Jr.'s first mate was his feisty and funny feathered friend Salty the Parrot (voiced by Mel Blanc).

The series was conceived by Sam Singer's production company in 1960, with Dal McKennon voicing the title role.

AIP's television division eventually negotiated an agreement under which Hanna-Barbera would produce the series, with Tim Matheson replacing McKennon.