AllMovie

Vito Scotti returns as Dr. Boris Balenkoff, who during his last visit to the island conducted a series of diabolical experiments resulting in some severe personality changes amongst the Castaways. This time, the mad doctor has come bearing gifts--namely, a collection of attractive-looking rings. Unfortunately, when the Castaways slip on the rings, they leave themselves vulnerable to Balenkoff's latest mind-controlling experiment...which, if successful, will culminate in the robbing of Fort Knox!