During the construction of the Sodor Search and Rescue Centre, Sir Topham Hatt decided to build his new office inside the old tunnel, but Whiff insisted that it was not a good idea as it connects to Misty Island. When Percy saw Thomas' smoke signals coming from Misty Island, Whiff and Percy used the old tunnel to find Thomas and the Logging Locos. Afterwards, Misty Island Tunnel was restored and officially reopened. It was the most common way for the engines to travel between the two islands.
- Season 14 - Being Percy, Jumping Jobi Wood!, Jitters and Japes and Merry Misty Island
- Season 15 - Toby and Bash, Emily and Dash, Edward the Hero, Happy Hiro, Let it Snow, Stop that Bus, Stuck on You, Tree Trouble and Fiery Flynn
- Season 16 - Race to the Rescue, Express Coming Through and The Christmas Tree Express
- Season 17 - The Thomas Way
- Season 20 - Buckled Tracks and Bumpy Trucks