A NASA spacecraft proves Einstein right when, travelling faster than light, it ends up near King Arthur’s Camelot. On board are big-hearted Tom Trimble and Hermes, the look-alike robot he built. Tom immediately makes friends with pretty Alisande and enemies with the awful knight Sir Nordred. It seems Nordred is out to oust Arthur, while Alisande’s father is not the goose she believes him to be but is also a victim of Nordred’s schemes. It’s as well the Americans have arrived.

Three lovable party buds try to bail their friend out of jail. But just when the guys have mastered a plan, everything comes dangerously close to going up in smoke.

Bus driver Stan Butler agrees to marry Suzy, much to the anguish of Mum, her son-in-law, Arthur, and daughter Olive. How, they wonder, will they ever manage without Stan’s money coming in? Then Arthur is sacked, and Stan agrees to delay the wedding. Meanwhile, he hits on an idea: Arthur should learn to drive a bus. Somehow he does just that, and even gets a job. Stan then blackmails the Depot Manager into giving him the job of driver on the new money-making Special Tours Bus. A great idea …if only the inspector hadn’t taken Stan on his trial run to the Windsor Safari Park