Double Teething Troubles

"That's MY line of trucks!" "S'not! It's mine! Yours are over there!" "S'mine!" "S'not!" "S'mine!" "S'not!""

- Bill and Ben

"Double Teething Troubles" is a fifth season episode.

Plot
Bill and Ben argue over who has rights to some trucks nearby, and, despite Boco's warnings, derail each other at the points. The Fat Controller decides to send a new diesel to help them, but the diesel, Derek, is new and has problems with his cooling system, as seen after he breaks down on Gordon's Hill. The news soon spreads, and Percy, who misunderstands Thomas when he mentions Derek has teething troubles, tells the horrified twins the diesel has toothache. The next day, Derek arrives and helps the twins with a long train of china clay trucks. However, Derek's engine overheats, and he stops. Bill and Ben to pull him and the trucks, and Derek is sent to the works. Bill and Ben apologise to Boco for being rude, and they and Duck talk about teething troubles all night long.

Featured characters

 * Thomas
 * Percy
 * Duck
 * Bill and Ben
 * BoCo
 * Sir Topham Hatt
 * Derek (not named)

Trivia

 * Teething troubles usually occur after steam engines, diesel engines and other vintage machinery are restored to working order.

Goofs

 * It's said that Bill and Ben heard an unfamiliar whistle (Derek's), but diesels have horns, not whistles.
 * In a rare picture Derek is smiling even though he overheats!
 * When Derek overheats for the second time, one cheek is redder than the other.
 * A grey cord can be seen in Bill's side in the shed at the end.

Quotes

 * Percy: Hey you two. This new diesel's got toothache. Good luck!


 * Derek: I'm overheating again!
 * Ben: Oh pah!