Daddy Pig winds up the old cuckoo clock in Peppa and George's bedroom. When the clock strikes the hour, a wooden cuckoo bird pops out, flapping its wings and singing 'Cuckoo!', but George wasn't looking and missed the whole thing. George does not want to miss the cuckoo again.

Grandpa Pig has built a fantastic little train called Gertrude. When he takes Peppa and George for a ride on Gertrude, they meet their friends along the way. There is plenty of room on the train for everyone, so they all hop aboard. Peppa and George think that Gertrude is the very best train in the whole world!