Henry Jekyll is a troubled man. His wife died of pneumonia. He wants his sister-in-law, but her father forbids any contact. And his experiments into the dual nature of man have yielded a personality-splitting drug that he has tested on himself, changing him into an uninhibited brute who seeks violent and undignified pleasures. Jekyll quickly becomes addicted to the sordid freedom induced by the drug. He can commit the most enjoyably revolting deeds, then return to his laboratory and use an antidote to change back to his original form, so that his lofty persona remains untarnished.
An amoral, psychotic playboy incites three men who are down on their luck to commit a mail van robbery, which goes badly wrong.
In a mansion block in Knightsbridge, a gang of middle-aged biddies decide to brighten up "the dullness of the tea time of life" by staging a series of robberies on furriers, then donating the proceeds to charitable concerns. Terry Thomas as a retired army officer leads the gang, which includes Athene Seyler and Hattie Jacques, on a series of capers that nearly go awry when their maid, Billie Whitelaw, an ex-con and also a resident of the block, falls for a police officer.
