Captain Beyond is an American rock supergroup formed in Los Angeles in 1971. Consisting of former Deep Purple singer Rod Evans, former Johnny Winter drummer Bobby Caldwell, former Iron Butterfly guitarist Larry Reinhardt and former Iron Butterfly bassist Lee Dorman, the band had an eclectic style bridging elements of hard rock, progressive rock and jazz fusion with space rock. They released three albums between 1972 and 1977.

Progressive rock is a broad genre of rock music that primarily developed in the United Kingdom through the mid- to late 1960s, peaking in the early 1970s. Initially termed "progressive pop", the style was an emergence of psychedelic bands who abandoned standard pop traditions in favour of instrumentation and compositional techniques more frequently associated with jazz, folk, or classical music. Additional elements contributed to its "progressive" label: lyrics were more poetic, technology was harnessed for new sounds, music approached the condition of "art", and the studio, rather than the stage, became the focus of musical activity, which often involved creating music for listening rather than dancing.