The garrison commander, General Thoiras, recruits François and Gullot to break through Spanish lines to get word of the attack to the French Army.

The pair, with their superior swordplay and horsemanship, embark on a daring mission evading capture, enemy spies and pursuing soldiers to deliver their message.

The series ends with the Chevalier bringing news of the peace conference's decision to the Spanish Forces surrounding the castle.

The Aeronauts was set in the present day and featured a couple of daring French Air Force Mirage fighter pilots.

In 1988, Andrew O'Connor, Kate Copstick, Bernadette Nolan and Terry Randall produced a spoof version which was broadcast on the Saturday morning children's show On the Waterfront.