Wonky Whistle

Wonky Whistle is the seventeenth episode of the fifteenth season.

Plot
Thomas's whistle is broken, so he goes to the Steamworks to have it repaired. However, he rushes off on a delivery before it is properly fixed and soon finds that his new whistle has a worryingly wacky sound.

Characters

 * Thomas
 * Victor
 * Bertie
 * Kevin
 * Sir Topham Hatt
 * Farmer McColl
 * The Maithwaite Stationmaster
 * Edward (cameo)
 * Henry (cameo)
 * James (cameo)
 * Percy (cameo)
 * Toby (cameo)
 * Mavis (cameo)
 * Hiro (cameo)
 * Bash (cameo)
 * The Teacher (cameo)
 * The Bird Watcher (cameo)

Trivia

 * Two farmhands and a steamworks worker speak; it is currently unknown who voiced them.
 * Farmer McColl's dog is revealed to be named Katie.
 * Stock footage from Hiro Helps Out, Being Percy, and Toby and Bash is used.

Goofs

 * Thomas should have asked the workmen to hurry up with fixing his whistle, not Victor.
 * Thomas' driver should not have let Thomas leave whilst the workmen were still working on Thomas' whistle.