The Agatha Christie Hour is a collection of ten hour-long dramas based on short stories by the most popular novelist in history. Some were romances, some had supernatural themes and a couple were adventures. The common link was that all came from the talented pen of Agatha Christie, all were entertaining and each drama was carefully crafted and well cast with many of Britain's best known actors of the time represented.
The Mystery of the Blue Jar Playing golf early one morning, Jack Harrington hears a cry, "Murder! Help!" from a nearby cottage. He runs up to find a beautiful French girl, Felise, placidly weeding the garden, oblivious to any disturbance. When the Jack hears the same cries for many days he begins to think he might be mad. But are more sinister forces at work?
The Red Signal Dermot West is invited to dinner at the home of Jack and Claire Trent. The first is his best friend, the second, the woman he loves. During the evening the conversation turns to the supernatural; Dermot admits he frequently gets what he calls 'the red signal' to warn him of impending danger. He neglects to mention that he is getting the signal strongly that night!