Based on 'James Bond of the Secret Service' written in the 1950s, which would eventually become the novel 'Thunderball,' then a film of the same name, and years later even more script variations, 'Warhead' 1978 is the topic of this episode of our 'Unmade' season of episodes about James Bond films that never got filmed as intended. How much would survive in to the production that ultimately became 'Never Say Never Again'? Hold on to your hats for invisible cliffs, nuclear powered undersea cities, robotic sharks, underwater jetpacks, a fetish for building scale models, twin sisters, alien and time travel theories on the Bermuda Triangle, and many, many more bonkers plot ideas in a film where Blofeld was front and centre.