I've Lost My Train is the ninth episode of the first series. It first aired on September 16, 1999.
Poor Jake cannot find his favourite train anywhere. Neither Milo, Bella and Fizz know where it is. Jake becomes sad because there is nothing else that will entertain him. Soon enough, Milo has an idea. They all make a runaway train that they can all enjoy out of big cardboard boxes. It has cheered up Jake a bit. They decide to try continue to find Jake's train, but none of them apart from Doodles who has found it! It was in the Messy Area the whole time!