When does The Secrets of Isis return?

The Secrets of Isis was the first weekly American live-action television series with a female superhero lead character. Isis is the alter ego of Andrea Thomas, a seemingly normal schoolteacher, who transforms into the Egyptian goddess when presented with crises a mere mortal cannot resolve. Isis and its companion series Shazam! had crossover episodes where Captain Marvel and Isis would appear in each other's shows. Since then DC Comics has adopted the character of Isis into their mainstream continuity.
Isis starred Joanna Cameron as Andrea Thomas, a science teacher at Larkspur High School who found an ancient mystical gold amulet, the "Tutmose amulet", on an archeological dig in Egypt. The amulet gave the wearer "the powers of the animals and the elements", which would be bestowed upon such wearer by the goddess Isis whenever it was exposed and her name invoked.