At the docks, Thomas and Percy are working hard, but the new crane, Cranky, thinks little engines are useless - "bugs" he calls them. But that night some rough weather makes a tramper crash into the shed where Gordon, Henry, James and Duck are, trapping them inside. Cranky is then toppled over by the high winds. Who will save them all now?

The engines are working really hard, and the Fat Controller thinks they need some help. He hires 3 lorries to help them, but the lorries are rude to the engines. The engines have the last laugh though when the lorries get into difficulties.

Gordon is to take important people to the opening of the new station at Kirkronan, but as he comes near his crew find that they can't stop him, and he's heading for the station wall, and fast...

It's Lady Hatt's birthday, and her husband, Sir Topham Hatt, is throwing a party for her. While driving on his way to Kirkronan where the party is being held, he accidentally runs into a large pothole in the road and this leads to all sorts of unexpected difficulties for the poor chap!

James has recieved a new coat of paint and becomes too cocky, even to recognise the dangers trees could cause. However, he learns his lesson when his trucks cause trouble for him during wet weather.

One morning, a special coach is being prepared to be coupled to Gordon to carry a V.I.P but unfortunately the turntable it is on becomes jammed. After Godon finally receives the coach after the turntable's repair, he puffs off to Kirkronan station to pick up the mystery person. But as he is now late, will he make it on time or will "gremlins" strike again?

George the Steamroller is working around the island and as usual, is causing great problems for the engines. But this time, he just takes things too far. Will he receieve his just desserts?

The stations on the Island of Sodor are entering the "Best Dressed Station" competition. Percy agrees to help Maithwaite try and win by delivering fruit and vegetables to decorate the platform. On the way there with his special load, he has an unexpected run-in with a stray ram - however, the hungry creature later becomes Really Useful when some vandals strike at Maithwaite!

Percy has been working very hard recently and feels put upon by this. The trucks find out and try to make him work even harder. Percy then takes them to the mine, but they break away and cause the mine to collapse. Will Percy escape the vicinity in time?

Toby has been sent to check the dam on the river. It has been raining heavily recently and there are worries the dam won't hold. After inspection, the dam starts to break up! Will Toby escape its wrath in time?

One evening, Henry has to take some trucks to the other end of the line, and everything is fine until he has to travel through a spooky section before a viaduct, of which Henry becomes convinced is haunted after experiencing quite some oddities...

Bill and Ben need some help at the China Clay Pits, so the Fat Controller sends a diesel, Derek, to help them out. But Derek suffers from mechanical failures, "teething troubles", and as expected, this leads to difficulties...

Stepney is bored, so the Fat Controller agrees to allow him to help out Mavis and Toby at the quarry for the day. He works well, but on the way home gets lost and ends up in the scrapyard, where diesels 'Arry and Bert take him for scrap!

The Fat Controller and his grandchildren, Bridget and Stephen, discover an old castle as well as the mine where "the little engines once worked" whilst out on a trip with Toby and Henrietta. The Fat Controller decides to turn sites into tourist attractions, but Toby hears that the mine is haunted...

Whilst waiting for his fish vans to be loaded up, a crate of fish is accidentally dropped on poor Thomas! On the way to the docks, Thomas notices that the coastal line is damaged, and on his arrival with the "Flying Kipper" trucks which are to be passed on for Henry to pull, Henry teases him about his fishy smell. Then when Henry heads off, the signalman is unaware till too late that he has accidentally switched the train onto the damaged coastal line, which won't be able to take Henry's weight for sure!

Thomas and Percy discover Old Slow Coach, who is going to be scrapped. They want to save her, but aren't quite sure how. Later, the workmen's hut is burned down and the fire engines have to borrow water from Thomas' and Percy's tanks to put it out. But where will the workmen live now?

Harold is seen by the engines suspiciously flying around and think he's scouting the area so he can find ways to replace them. Thomas tries to find out the truth, but what does the children's playground have to do with it?

Oliver has to take the Post Train for the first time, and he gets lost on the way home. But what is it that he has found?

Percy discovers from Mrs. Kyndley that her daughter is to be married "today" but has forgotten about the good luck package. Percy decides to try and help out with the problem.

The Fat Controller, his wife and grandchildren go on holiday, but various incidents keep affecting their plans!

Percy is pulling some trucks up a hill when the coupling between him and the first truck breaks. This causes the trucks to break away and roll down the line, and at a tremendous pace at that! Will Percy catch them in time before they cause even more of a disaster?

Mrs Kyndley is upset that her sister, who was coming to visit, isn't able to make it. The Fat Controller decides Mrs Kyndley needs cheering up and asks Harold and James to help out.

Toad the brake van is feeling glum as he is always seeing things sliding away from him and would like to go forward for a change. Oliver wants to help but doesn't know how. That afternoon, Oliver is pulling some trucks up Gordon's Hill, with Toad as his brake van. The trucks break away after a coupling snaps and now Toad is at the front of the train going forwards. Unfortunately he is on the Main Line with various possible disasters up ahead!

Peter Sam is pulling some trucks, but when he has to stop to take on water, they use the opportunity to break away. The trucks are thrilled to be on their own - until they come to the ravine bridge and fall in. Peter Sam is told off and Duncan has great delight in teasing him. Rusty tries to stop this by telling the story of an engine who tried to cross the Old Iron Bridge but never made it to the other side due to loss of control. Duncan thinks this is a load of nonsense and puffs away, so the Driver and Fireman plan a trick to play on him for when they cross the bridge that night...

The Fat Controller has opened a new mine, and both the normal gauge and narrow gauge railways have tracks to it. An old boulder has had to be moved to make way for the mine, and Rusty is worried about it. Some time later the boulder is shaken loose and falls off the cliff it has been placed on and it chases Rusty down the line! Rusty manages to escape via a siding, but the boulder continues to thunder along! Back at the mine, Percy, with nowhere to run, sees the boulder up ahead, and it's heading straight for him...

Thomas and Rusty are both trapped at a tunnel and can't go any further until the the heavy snow is cleared away that has fallen. So to pass the time, Rusty tells Thomas the story of how Skarloey was traveling through a ravine when an avalanche came down on him.

Salty, an old diesel, arrives on Sodor. He loves working by the sea but is most disappointed to find that the Fat Controller has sent for him to help out with the work at Centre Island Quarry, resulting in him of course not being able to work by the sea as he had hoped for. However, Salty is soon given a pleasant surprise...

Harvey the Crane Engine arrives in Sodor on trial. Some of the engines tease him for his strange looks but when Percy has an accident with some trucks, they soon change their minds...

Cranky is always feeling, well... cranky! This is because every night he has to stay up late to load and unload important goods being imported and exported at the harbour. Then one day, Salty (unintentionally) gets on the crane's nerves so much that in a fit of rage, Cranky drops some pipes that knock over a shed resulting in blocking the Main Line! Harvey won't be able to clear the shed till morning so how will the time be able to be passed?

Percy likes taking the Post Train but when he is held up at a broken signal one day, Harold decides to deliver the loads instead, but all at once, which turns out to be a very big mistake!

Thomas, by accident, discovers an old sentinel lorry named Elizabeth who has been left in a shed for years.

Cyril is a fogman and the engines like him a lot. He puts out detonators to warn them when there is fog ahead. However the Fat Controller decides to replace him with a very loud fog horn. The foghorn however causes a rockslide which crushes the foghorn, and Thomas is just down the line...

Thomas delivers Jack the Front Loader to a construction site where a team of vehicles from the Sodor Construction Company - "The Pack" is working under the supervision of Miss Jenny. But Jack gets too excited about working and runs into a right spot of bother and Miss. Jenny wonders if he is not ready to join.

Ned the Steam Shovel accidentally knocks loose the important keystones from an old rail bridge, and Thomas is just down the line. Jack, however, with a bright idea, jumps in...

It's Christmas and Thomas and Toby have to deliver a Christmas tree to one of the villages on Thomas' branch line. However the snow is getting deeper and deeper, and when Thomas' snowplough breaks, will the special train make it to the village?

Donald and Douglas have an argument and refuse to speak to or work with each other. However when Donald comes off the tracks, only one engine can come and help him...

Diesel is back after Henry has an accident, and annoys the other engines by boasting about how he is the world's strongest engine. To prove it, Diesel tries to pull 20 trucks at once, but they all have their brakes on and cause a coupling to break resulting in Diesel being launched down the yard...

On Halloween, Edward tells the engines spooky ghost stories. The stories make Percy scared and so Thomas teases him about this. On the same night, Thomas, Percy and Duck are sent to the Smelter Yard. But when Thomas says he can manage alone to finish off the job, off Percy and Duck go, but how brave is Thomas when he's on his own?

Percy goes to collect some goods at the Abandoned Mine, and sees an old chimney there sink to the ground. Percy is spooked, and hears from Donald and Douglas the next morning that the "naughty gnomes" are responsible...

Percy hates being a "middle engine" where he has trucks both in front and behind him. 'Arry and Bert, the Smelter Yard diesels, trick him into being a middle engine, and James boasts at the shed to the others that the pair wouldn't be able able to trick him. They do however and James, annoyed at being a middle engine, refuses to move...

A red hot air balloon has arrived on the Island of Sodor and Thomas is sent to fetch it. The balloon becomes a popular tourist attraction, but James worries it will take his passengers away.

The weather is getting colder so the Fat Controller asks James and Percy to make extra coal deliveries. Thomas seemingly warns Percy that he should be careful or else scary Jack Frost will get him. James thinks this is a load of nonsense, but Percy believes him. But when night comes and Percy has to make a delivery of coal to Lower Suddery both he and then later James think differently, but not as you would probably expect!

Gordon says that pulling trucks "wouldn't be dignified" and Salty teases him about this and acting "too big for his buffers". Gordon becomes cross and wants to show Salty a thing or two but ends up in a rather "undignified" situation instead!

There is a water shortage on the Island of Sodor and Percy is upset because he can't be washed down as often as he would like. He gets very dirty very quickly and so decides to deliver some sugar to the Chocolate Factory - after all, he can't get dirty doing that, can he? But an oil spillage on the track leading straight to the Chocolate Factory spells disaster - and dirtiness!

When Ben gets new buffers fitted, Bill gets jealous. Mavis advises him to forget about it, but Bill becomes so obsessed with it that he loses focus on his own work and has an accident.

Snow has arrived on the Island of Sodor, but for a farmer this has caused trouble. His lambs are trapped on the hills and only Toby can help him rescue them.

An opera singer, Alicia Botti, has been invited to the Island of Sodor and Thomas is to take her to her concert. He is cleaned up ready for the journey, but when boarding Annie, Alicia discovers a mouse onboard!

Thomas is sent to the harbour to pick up a jet engine, but when Cranky accidentally turns the switch on with his arm, Thomas finds himself whizzing down the line!

Gordon comments that "Edward is a useless old steam-pot" and that he should retire. The other big engines agree with him but Percy gets upset at this and tells the Fat Controller. In the end, Edward proves to be a Very Useful engine indeed when Duck and Gordon have a spot of bother...

Duncan is so hasty that he is not uncoupled and goes up the incline with the trucks, but the coupling on the truck his coupling is tangled up with can't hold his weight. It snaps, and down Duncan goes, and there's a muddy pond waiting beyond...

Faced with the threat of forever working in the quarry if their line is not repaired, Skarloey and Rheneas get worried. Rusty though, is onhand, along with the help of Elizabeth, after persuading her that is! Will the line be able to be repaired in the 2 week time limit the Fat Controller has allowed?

Duncan shows off his whistle, and blows it so hard that it shoots into the sky and lands in a field. Duncan's driver says they don't have time to find it, but they need a whistle for safety reasons though. Luckily a school headmaster has an organ they can use as a whistle, much to Duncan's horror.