"Ring Around Gilligan" was the second and final appearance of Vito Scotti as Dr. Boris Balinkoff, previously seen in "The Friendly Physician," still accompanied by Igor (now a tiny monkey rather than hulking Mike Mazurki, actually wearing the same clothes!). Instead of mind transference, the doctor has now created a ring that, when worn on the finger, makes the wearer a mindless robot slave to the mad scientist's will ("scientist yes, mad no!"). Gilligan makes for an easy first subject, but once Ginger dons the ring Balinkoff heartily approves of her form fitting bathing suit: "our robots are getting better every time!" The most incredible sight is Gilligan acting under Igor's instructions, hanging from trees and behaving like the monkey he is. With all seven castaways under his control the doctor's goal is to rob Fort Knox of all its gold, only to be foiled by an assault of coconuts, crushing his mechanical control device. With a total of four episodes, Vito Scotti proved the most prolific guest star on the show, twice as Dr. Balinkoff, twice as the Japanese sailor from the first season. The expressive monkey would be back in the penultimate episode, "Bang! Bang! Bang!" and was even funnier in a hilarious BATMAN episode "Pop Goes the Joker."