It's been a while since we scoped The Secrets of Isis.
Student Cindy Lee (Joanna Pang) takes a dare to enter a junkyard, and encounters a gang of car thieves who'd earlier stolen a car belonging to Andrea Thomas (Joanna Cameron), aka Isis. Typical Filmation live-action fare of the period.
Albert Reed (Principal Barnes) had previously appeared on Chase, then took up a career in law enforcement of his own, working as a security guard. Who'dathunk?