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While still seeking a method to reverse his invisiblity, Peter Brady takes on a top-secret mission for the British government. Col. Warren (Eric Pohlman) asks Peter to parachute (presumably naked!) into a hostile Middle Eastern country, there to rescue intelligence agent Jack Howard (Howard Pays), who is being held captive in an enemy hospital. Adrienne Corri, best remembered as the rape victim in Stanley Kubrick's A Clockwork Orange, is cast as Peter's contact, rebel leader Yolanda; also in the cast as the villainous Omar is Martin Benson, better known as the ill-fated gangster with a "pressing engagement" in the James Bond epic Goldfinger.