British Ministry agent John Steed, under direction from "Mother", investigates a diabolical plot by arch-villain Sir August de Wynter to rule the world with his weather control machine. Steed investigates the beautiful Doctor Mrs. Emma Peel, the only suspect, but simultaneously falls for her and joins forces with her to combat Sir August.

Aliens from Outer Space are slowly switching places with real humans -- one of the first being a young man about to get married. Slowly, his new wife realizes something is wrong, and her suspicions are confirmed when her husband's odd behaviour begins to show up in other townspeople.

On a nice sunny day, Dull and his clones try to figure out how to make the most of their time outside