Thomas & Friends (1984)

S11E10 Thomas and the Big Bang

Thomas receives a shiny new whistle and can’t resist the urge to pull pranks on the Narrow Gauge engines. Before long, the other small engines catch on and join in the fun, leading to a series of mischievous antics that disrupt their work. However, the question remains: will Mr. Percival find their antics amusing, or will he put a stop to their playful chaos?