Seeing is Believing
- Episode aired Sep 19, 2018
- TV-Y
- 10m
When Thomas's friend Merlin the stealth engine comes to Sodor from the mainland for the first time, Percy is determined to see this 'invisible' engine.When Thomas's friend Merlin the stealth engine comes to Sodor from the mainland for the first time, Percy is determined to see this 'invisible' engine.When Thomas's friend Merlin the stealth engine comes to Sodor from the mainland for the first time, Percy is determined to see this 'invisible' engine.