The main characters were Commander Jonathan Kidd; biologist Erica Lane; scientist Busby Birdwell; and a "master of mysterious powers" known only as Guru. The team was reduced in size for its missions, each miniaturization period having a time limit of 12 hours, and it traveled around in a microscopic flying submarine, the "Voyager," doing battle against the unseen, unsuspecting enemies of the free world, both criminal and germinal matter. The missions of the team were given out and supervised by Professor Carter, in charge of the miniaturization process, and a character usually referred to as "the Chief" (presumably the overall leader of the CMDF), who was always seen only in shadow. The series featured character voices provided by Marvin Miller, Jane Webb, and Ted Knight. The producers were Lou Scheimer and Norm Prescott, the director was Hal Sutherland, and the music was provided by Gordon Zahler.