A unicorn named Lasso Lashes, who is Nathan's great great grandcolt, goes with his friend/sister-figure Izzy Moonbow to Maretime Bay, there he meets the gang. He soon feels very appreciated, especially from Pipp Petals. But one evil alicorn has plans of her own for him.

This story is a sequel to Thomas, Misty Brightdawn And The Royal Engine

This is the final chapter of Thomas and Misty Brightdawn.

When Diesel 10 and Burnett Stone's old rival P.T. Boomer threatings to take over Sodor and Equestria, Thomas, Misty Brightdawn and Alphabittle must reunite to save their homes.

Cast:
Thomas
Misty Brightdawn
Alphabittle Blossomforth
Edward
Henry
Gordon
James
Percy
Toby
Emily
Nia
Rebecca
Rocky the crane
Timothy
Luna
Lady
Rosie
Bear
Paxton
Sidney
Samson
Bradford the breakvan
The fire fighters
Flynn
Jack
Alfie
Merlin
Shawn the white Lion
Beresford the crane
Lexi
Theo
Frankie
Hurricane
Spencer
Connor
Caitlin
Stepney
Jinty
Duchess
Kate Tootington
The Flying Scotsman
Harold the helicopter
Duncan
Sir Topham Hatt
Diesel 10
P.T. Boomer
Diesel
Arry
Bert
Splatter
Dodge
George the steamroller
The three diesel shunters
D261
D199
Asher