Gordon and the Gremlin is the sixth episode ever made in Season 5.
Gordon has problems with his fire; Thomas suggests the cause is gremlins. The others argue about the issue until the Fat Controller arrives and informs Gordon that he will be taking a VIP, who has heard a lot about the Fat Controller's engines. Although the turntable in the goods yard malfunctions, Gordon manages to get to Kirk Ronan on time, and collects the special passenger. At Wellsworth, the passenger's Dalmatian runs away and, after confronting a bull, runs away, frightened, into Thomas' cab. At Brendam, Thomas inquires about the visitor, and the Fat Controller reveals she is his mother, who then aptly renames her dog "Gremlin".
- The fireman was actually the one who found the gremlins.