The Challenge (1998)

S8E21 Halloween

On Halloween, mischievous diesels 'Arry and Bert seize the opportunity to scare their steam engine friends. While Thomas and Emily are busy with crucial tasks at the Smelter, the two naughty diesels plot to create some spooky surprises for the unsuspecting steamers. Their antics promise to bring a thrilling twist to the holiday, as they aim to give Thomas and Emily a good fright!