It's Harry Palmer's Wits Against The World's Deadliest Mind! Secret agent Harry Palmer (Michael Caine, Get Carter) is blackmailed into working for MI5 again on his wildest - and most dangerous - assignment yet. An insane oil billionaire, intent on destroying Communism by starting a new world war, is close to achieving his goal with the help of the world's largest, and most powerful, computer.
A group of scientists, led by Dr Barton (Jeff Morrow , take a trip into the Florida Everglades to find the sinister Gill Man, capturing him for further medical experiments and to utilise his ability to breathe underwater to further space travel. But the rampaging Gill Man pays the team an unexpected visit and is accidentally set on fire. In saving his life, the deranged Dr Barton discovers that the creature has lung tissue and can be transformed to become more human than fish.
