Return of Boulder

Return of Boulder is episode 15 of Season 7 of The Chronicles of Equestria and The Isle of Berk

Summary
The riders notice Rusty has been going away every clear night, so they follow him, to where Boulder was put at the end of Rusty & The Boulder, the Crusaders then tell the vikings about the boulder's backstory, but then the next day, the boulder starts rolling again and it start wreaking havoc on the line as well as chasing Rusty all around the line so the riders chase after to stop it before it's too late.

The quarry
One day in the Skarloey Engines railway

Scenes

 * The quarry