Missing Gator

S18, E13: Percy misses his friend Gator and keeps thinking back to the times they had together. It's making him sad, so the other engines advise him to keep himself busy to take his mind off it. So Percy rushes about trying to keep busy, and ends up losing control of some trucks which roll into an old mine. Percy is frightened to go in after them, until he remembers Gator again and what Gator taught him about being brave!