The show ran from 1974 to 1977 on CBS]]; from 1975 to 1977 it was known as The Shazam!/Isis Hour, and included The Secrets of Isis]], about an Ancient Egypt]]ian superheroine resurrected in the body of a schoolteacher]], as the second half of the hour. Shazam! was brought back for reruns from January 5 through August 30, 1980. Actor Michael Gray (actor)|Michael Gray]] stars as young Billy Batson and Les Tremayne]] as his guardian "Mentor", while Captain Marvel was played first by Jackson Bostwick]], and later by John Davey (actor)|John Davey]]. Actress Joanna Cameron]] appeared as Isis, and her alter-ego Andrea Thomas, on three episodes of Shazam!, and Davey likewise appeared as Captain Marvel in three episodes of Isis.