Calley worries she doesn't have a specialty, but proves she is a great all-rounder.

Brewster is trapped when he falls into a sinkhole.

Cormac loves to be busy, but with a problem at the docks, he gets increasingly bored, but when Jackman, Asher and Calley are trapped behind a rockfall at the quarry, it's Cormac to the rescue. Cormac tried to lift the large pieces of rock, but they're too heavy, then he saw a big excavator, he used the excavator to smash the pieces of rock to save the Chug Patrollers and save the day.

Wilson, Brewster, Koko, Hoot and Toot are going to Trainee Camp to learn new skills and work as a team.

Harrison must devise a special tour of Chuggington in order to pass his tour guide test.

Cormac challenges Old Puffer Pete to a delivery contest. Meanwhile, The Chuggineers are relining a tunnel.

Koko learns that being careful and quick is the trick to being an express courier train when she nearly has an accident at the docks.

When the dock's crane breaks down, Skipper Stu must find another way to load the ship.

Jackman, Asher, Puffer Pete, Olwin and Koko have to struggle down an icy slope to get to the inaccessible frozen over docks to get fuel for all the chuggers when an ice storm hits Chuggington and fuel supplies run low.