Dalby challenges General Cathcart, suspecting American involvement in Dawson's abduction. Harry and Jean head to the Pacific atoll where the neutron bomb is to be tested.
It's 1963. Cold war rages between West and East. Nuclear bombers are permanently airborne. In this highly charged atmosphere, we join Harry Palmer - a British army sergeant on the make in Berlin. In this newly partitioned city, a sharp working-class young man with sophisticated tastes can make a lot of money. Wholesaler, retailer, fixer, smuggler, Harry's varied interests bring him into contact with everything and everyone - until the law catches up and it all comes crashing to a halt.
The Ipcress File - Series 1, Episode 4 Synopsis and Schedule