Antonio Riccardi, a rare stamp dealer who is secretly a hired killer, pays for the violin lessons of his gifted brother Giuseppe. To meet the expenses of Giuseppe's concert debut he accepts a further job, but his decision to do so provides Detective Inspector Carson, who has long hoped to ensnare Tony, with an opportunity that might now enable him to bring about his downfall.

The adventures of children lost in fog on Dartmoor, who encounter a wild dog, an escaped convict, and other dangers.

A small English village is in turmoil with the arrival of a pop star and his wife. He soon becomes the conductor of the local brass band after the previous conductor is criticized for the false notes played by the brass band.

In wartime, a young officer is killed during a raid to kill a German general at the house that used to belong to his grandmother. Before he dies he talks about a treasure that was hidden there. Several years later, the members of that group are still together as a street band living in a cellar. The last of the gang, who was chosen for his skills as a ruthless killer, escapes from prison in a rampage of killing and, obsessed with the treasure, takes the gang to France to recover it.

When heavy fog prevents any flights from leaving London Airport, a group of passengers are put on a bus driven by Percy Lamb to drive to another airport. The fog is that heavy Percy doesn't know where he is going or that he is carrying stolen gold bullion that the robbers and police are relentlessly pursuing.

Matter-transmitter sabotage leaves a British scientist (Bryant Halliday) disfigured and full of amps.