Thomas & Friends (1984)

S9E5 Molly's Special Special

Molly is an adorable new engine, distinguished by her vibrant yellow color and four large driving wheels. However, she finds pulling empty trucks to be far from delightful. Instead, she dreams of hauling a well-loaded goods train. Thomas offers her a piece of advice, but Molly wonders if it's the right choice. Despite her reservations, she decides to follow his suggestion.