Harry Palmer, a former British Secret Service agent, now operates as a private detective. His initial task is to deliver a seemingly ordinary Thermos flask to an old acquaintance in Helsinki. However, Palmer's curiosity is piqued by the flask's contents and the true intentions of his friend and their Texan billionaire boss.

Billion Dollar Brain
A celebrated British detective, Harry Palmer, uncovers a secret plot by a wealthy oil tycoon to utilize a cutting-edge supercomputer to topple the Communist government.