[2] An episode was aired once a week, and was based on the story of two boys, Tom Baxter and Geoff Reynolds, who find a spacecraft when digging in a field.

While digging on farmland, friends Tom and Geoff discover a cavern containing the skeleton of a Roman centurion and a craft named Aquila.

Other abilities of the ship include invisibility, a form of verbal remote control, lasers, a holographic interface and the Core Defence Wave Gun (capable of passing out everything in a 300 coleymort[a] (191.1 metres; 209.0 yd) radius.

The problem arose when a dog owner blew his own whistle when the craft was in invisible mode in the grounds of a stately home.

The words inscribed on the centurion's safety harness, 'Licat volare si super tergum aquila volat', translates as "A man can fly where he will, if he rides on the back of an eagle".

This proverb was derived from an ancient Greek story, where one day, the gods decided to elect the noblest bird of all by having them race to the top of Mount Olympus.