This series follows the adventures of Thomas the Tank Engine and all of his engine friends on the Island of Sodor.

Tugs follows the adventures and mishaps of two rival tugboat fleets: the Star Tugs and the Z-Stacks.

Captain Star hires a new tug called Sunshine, later the seventh member of the fleet, to help with the overwhelming duty of towing in the magnificent ocean liner 'The Duchess'

When barges start mysteriously disappearing around Bigg City Port, Ten Cents is blamed for stealing them. Grampus is determined to clear his friend's name and discovers a kidnapping plot and a mysterious pirate-like tug named Sea Rogue

Warrior is fed up of his reputation as being 'clumsy', so he decides to go throughout the rest of the day without causing any accidents whatsoever. However, this doesn't go as planned - and he causes a lot more accidents than usual!

Big Mac returns to the Star Dock one winter night claiming to have seen a fleet of ghostly white tugs drifting through the mist. At first, the Star Tugs refuse to believe Big Mac's claims, until an eventful night in the fog leaves them wondering if they are truly bordering on madness.

Ten Cents and Sunshine discover an abandoned tug named Boomer floating astray in the estuary. He claims to be jinxed, and whilst Sunshine believes him, Ten Cents scoffs at this superstition. However after several unnatural incidents, Ten Cents starts to come round to Sunshine's way of thinking

Due to increasingly warm weather in Bigg City, many foreign tramp steamers are put under quarantine, under the risk of them being diseased. Despite his engine troubles and fears of being scrapped, old O.J manages to sort things out when an old tramper causes confusion.

Whilst working up the canal, Zero switcher Zug accidentally traps himself with the Star Tugs by wedging an old tramp steamer across the locks. Now a useful pyromaniac alligator tug is their only hope...

An old dirty tramper, the notorious Johnny Cuba, suspected of smuggling lurks outside the limits of Bigg City bay. He forces Zebedee, one of the Z-stacks, to tow him into the safety of the harbour. Normally, Zebedee would have been glad to help out an old friend but this time - things are different.

Edward has trouble even starting up, earning scorn from James and Gordon, but his biggest problem is when he has to put all his strength and determination into finishing a journey through a storm that damages him.

Gordon can't run on branch lines for safety, but acts like he's too good for them. One evening, a mistake sends him down the branch line and he has an encounter with Bill and Ben.

Percy is fascinated by a ghost-story his driver tells him, but Thomas scorns him before Percy finds out it was fake. Still annoyed for how Thomas spoke to him after an accident with lime, he gets Toby to help him play a prank.

Henry, a big green engine, doesn't want to risk paintwork being ruined by rain, so refuses to leave a tunnel he enters on a trip. But he may end up being there longer than he wants as he ends up being bricked up.

Thomas, a small steam-engine, loves to brag to and tease Gordon about how hard he works, but strong, powerful, self-important Gordon decides to take him on a ride he'll never forget.

James' brakes catch fire and his freight-trucks push him out of control, forcing Thomas to use a breakdown-train to help him and to deal with the trucks that he has gotten used to.

Thomas is offered to switch jobs with Edward for a day since he wants to do more important things, but doesn't take the warnings seriously that freight-trucks are troublemakers.

Thomas is so impatient after waiting for Henry's train that he leaves without his guard.

Percy, Thomas, and Edward enjoy some free time for helping out, but Percy enjoys himself too much to be careful and is almost run into by Gordon - then has a delayed reaction and takes off backward.

Henry collides with a goods train while pulling "The Flying Kipper". The Fat Controller sends him to Crewe for repairs and he comes back with a new shape and a larger firebox meaning that he no longer needs special coal.

Toby, a tram-engine with little work, gets a chance to spend time with people who truly appreciate him, like the Fat Controller whom he doesn't know, but soon faces his railway's closing down.

James calls Toby and Henrietta "dirty objects" because of their shabby look. He tells them that you will never see his paint dirty. However, it's Toby who has the last laugh when James collides with some tar wagons.

Thomas arrogantly takes his driver's kidding seriously about how he could drive himself, and decides to try - and runs into trouble since he can't control himself.

Sent to Edward's station until the big engines' anger at him over Diesel's lies cools, Duck has to avoid a group of runaway trucks that try to force him into an accident.

The viaduct is being repaired and is causing delays on the Fat Controller's railway. One day, Thomas being late means he can help his friend Bertie the Bus.