Carnival of Junk

Mandy is looking forward to the family holiday in Jamaica because she's longing to see the carnival, but she is ill due to chicken pox and the holiday is called off. Meanwhile, the Twins are trying to keep Pontypandy tidy, but in their attempt to clear up, James gets trapped beneath an old boiler. When he escapes Mike manages to lay his hands on the boiler and turn it into a steel drum. He enlists Sam's help to bring a Caribbean carnival to Pontypandy.