After having driven his go-kart on the road in a dangerous fashion, Spring is taken to court and charged with 6 motoring offenses. The gang as witnesses tell the Magistrate the story of how Spring came to that point.
Tiger befriends Barney, a one-man band street musician. After constantly being moved on by a policeman, he hides out with the gang. After lots of fun and games, he leaves, and Tiger feels sad and takes it the hardest.
The gang discover a down and out musician sleeping on their bus, so help him by changing his image, name and musical style, turning him from Sidney into The Cool Cavalier. Now they need to promote him.
Whilst converting his black and white TV to colour, Brains and the gang receive a news report about an alien invasion from Planet 7. After decontaminating Doughnut they start fighting back, not realizing it's all a publicity stunt.
When a hot new female teacher starts at school, the boys all fantasize about her, though Billie sees her as a witch. When a charity musical show she is organizing loses its rehearsal room, the boys offer up their place.
The gang go and help Mrs Vickers before and during a visit by her evil landlord. Things as usual, don't go according to plan, so to help against her eviction, they do odd jobs to earn some money for her house repairs.
Local shop owner Mr Beaumont wants to turn the gang's den into a car park to service his shop. When the workmen arrive to start clearing the yard, it's up to the Double Deckers to stop them.
Whilst autograph hunting at the gate of the local film studios, a glamorous star's dog escapes from her car. Chasing the dog leads the gang onto a war film set, a horror set and more.