Mutiny on the Buses

Stan Butler declares his intention to marry Susy after falling for her. Jack welcomes the news, but Stan's Mum expresses concern that he will have to move out of the Butler home. The moment sets up the central personal stakes of the story.

The Butler family reacts differently to the engagement, with Mum's dissatisfaction highlighting ongoing tensions about money and living arrangements. Stan is eager to start a new life with Susy, while his relatives worry about finances and independence. The scene deepens the domestic pressure surrounding the couple.

Arthur loses his job, forcing Stan to become the primary breadwinner for the Butler household. This shift increases Stan's sense of responsibility and urgency to secure a future with Susy. The change also heightens the stakes around finding a flat and funding their plans.

A new depot manager named Mr. Jenkins is installed, bringing aggressive plans to improve profitability and reshuffle staff routines. Stan and Jack resist these changes, preferring their easygoing lifestyle. The introduction of Jenkins marks the start of mounting workplace tension.

Stan and Jack lead a stunt where crews are to wear only the company uniform, removing casual elements. The prank achieves little practical effect but embarrasses Blakey and irritates Jenkins, who blames the Inspector for letting it happen. The incident exposes the growing friction at the depot.

Seeing a real chance to help Arthur and secure Susy’s future, Stan begins to train his brother-in-law to drive a bus. The plan hinges on Arthur proving himself capable enough to earn a steady wage. The training step forward also risks drawing attention from the new managerial regime.

Jenkins installs a radio control system to keep buses running on time, with Blakey enforcing discipline through it. Jack tampered with the frequencies, causing cross-talk that leads to misunderstandings with police and airliners before authorities shut the system down. The incident heightens tensions between staff and management.

Jenkins equips Blakey with a new monitoring van to oversee routes more effectively. In short order, Stan and Jack inadvertently cause a fire at the depot, revealing the inadequacy of the firefighting equipment and triggering chaotic consequences. The event escalates the crisis at the depot.

The firefighting upgrades fail to prevent further mayhem as the depot is flooded by a foam machine. Olive arrives at the scene, fights with Arthur’s clippie Norah, and crashes her motorbike into a maintenance pit, believing Stan lied about the fire drill. The chaos grows, affecting everyone at the depot.

Jenkins presents a plan to run safari tours to Windsor Safari Park, offering a higher wage and tips for the driver chosen to handle the special bus. Stan feels a renewed spark of hope for affording a flat, but Blakey later reveals that he will not be allowed to take the job because of the previous mayhem.

Olive becomes pregnant again, and Susy realizes she will never marry Stan, storming out of the Butler home and returning her engagement ring. The setback compounds Stan's feeling of being trapped and heightens the stakes around the safari opportunity.

Stan and Jack learn of Jenkins's affair with Norah, which they exploit to blackmail him into awarding Stan the safari job. Blakey is shocked by the manipulation, but the plan appears to offer a way out of the financial bind. The scheme shows how far Stan will go to secure his future.

Stan prepares for the first safari run, donning a new uniform and the safari bus. A mishap damages the rear emergency exit, turning the trial into a disaster as the vehicle is left at the mercy of lions and monkeys. The failed run strains Stan’s engagement with Susy even further.

Back at the depot, Blakey prevents passengers from boarding Stan’s bus, echoing the earlier prank and creating a sense of déjà vu. In the aftermath, Stan ends up agreeing to marry Gloria, the attractive new clippie introduced during the upheaval. The film closes on a note of tentative, unsettled optimism.