When does Shazam! return?

The show starred Michael Gray as Billy Batson, a teenage boy who can transform into the superhero Captain Marvel by speaking the magic word "Shazam!" The show ran from 1974 to 1976 on CBS's Saturday morning lineup. From 1975 to 1977 it was known as The Shazam/Isis Hour and included The Secrets of Isis, about an Ancient Egyptian superheroine resurrected in the body of a schoolteacher.