Salty's Secret is the first episode ever made in Season 6.
Salty is a Diesel who enjoys working near the sea, so he is naturally disappointed when he is sent to work at the quarry. Salty manages to win the trucks over with his tales of the sea. Luckily for him, there is no further need for him at the quarry and he is transferred to Brendam Docks.
- When Mavis first meets Salty, her happy face is missing its eyebrows.