Episode 1
Gordon's coupler is damaged while pulling a long line of recycling cars to the Recycling Plant, Thomas and Diesel both pull the train in a contest. Thomas gave up winning the contest to keep his promise to Gordon.
Episode 2
It's rocket launch day and all the trains get to help deliver the big rocket parts, but when Thomas is assigned a tiny part, he puts it off to help the others with their more exciting parts.
Episode 3
When Percy has to deliver a new light bulb to the lighthouse at night, Thomas suggests playing secret agents along the way to help Percy forget about his fear of the dark.
Episode 4
When Thomas builds an obstacle course for his friends, he gets upset when they won't play with it his way.
Episode 5
Thomas volunteers to get Annie and Clarabel across Sodor without waking them up, only to discover that it's going to be harder than he imagined.
Episode 6
When Kana's power goes out during a delivery run, Thomas teaches her that sometimes it's okay to go slow.
Episode 7
It's Thomas's job to deliver a giant wooden dragon at the Medieval Faire at Kirk Ronan. The other engines want a turn, so they all compete to catch the dragon, pretending to be knights, thinking whoever catches it will get to deliver it.
Episode 8
When Thomas finds a treasure map, he creates The Big Adventure Club to seek the treasure. Sandy wants to join but Thomas says she's too little, so Sandy forms her own club.
Episode 9
When Thomas borrows Percy's lucky bell for a dangerous delivery, Thomas accidentally loses the bell.
Episode 10
When Sandy learns about a massive shipment of sand that needs to be delivered, she is determined to help despite her size.
Episode 11
When the trains must deliver in pairs, Thomas is disappointed to be paired with Diesel instead of his BFF Percy.
Episode 12
Thomas and Percy volunteer to deliver a herd of cows, but the cows keep wandering off on their own adventures.
Episode 13
When music-lover Nia gets stranded before a big concert she's been waiting to see, Thomas brings the concert to her.
Episode 14
Thomas misunderstands the Backwards Day game and accidentally delivers the wrong cargo to the wrong places.
Episode 15
Thomas and Kana get muddy while playing in the rain. When the rain suddenly stops and discloses a rainbow, an excited Thomas and Kana race to find the end of the rainbow.
Episode 16
When a parade balloon Nia is set to deliver flies away, Thomas helps Nia adjust her plans to get it back.
Episode 17
When Percy loses Nia's parade flag before the big parade, Thomas helps them search for it before the event begins.
Episode 18
Kana is upset when she keeps running out of power, but a mystery scavenger hunt is just the thing to cheer her up.
Episode 19
Thomas pretends to be a hero to help ensure the movie screen Nia's delivering arrives clean and pristine.
Episode 20
Percy feels anxious about spending a night away from home during an overnight delivery with Thomas and Nia.
Episode 21
When Thomas and Percy's plan to surprise Diesel goes awry, the two friends still manage to cheer up Diesel... just not in the way they expected.
Episode 22
When Thomas helps Nia make a delivery to the beach in Norramby, he insists he knows a shortcut and leads the way. It turns out, however, his memory isn't as good as he thought.
Episode 23
When all the trains but Thomas get deliveries, he's left to spend the day alone. With the help of an old boxcar and a battered beachball, however, an adventure unfolds.
Episode 24
When Thomas' No.1 gets covered by paint, Diesel's comment about Thomas not being number one any more causes him to doubt himself.
Episode 25
The engines look forward to the roller-coaster at the Vicarstown Carnival, all except for Percy, that is, who's a bit afraid.
Episode 26
Thomas is so excited to show Annie and Clarabel's passengers the scenic views of Sodor, but then the power goes out all over the island.
Episode 27
When Yong Bao visits Sodor, a jealous Thomas sets out to prove he's the braver train and challenges Yong Bao to a series of bravery challenges, only to have his plan backfire as the two end up trapped in the Old Mine.
Episode 28
Thomas and Percy think they're great communicators, but when they're tasked with delivering a submarine to Vicarstown, communication becomes a bit more difficult… to say the least!
Episode 29
Thomas and Percy have a difficult delivery, they must take eggs and other cake ingredients safely to Vicarstown for their bake-off.
Episode 30
When the engines are delivering attractions to the annual Harwick Beach Carnival, a series of mistakes causes the precious Calliope to break; luckily, the engines come up with a creative solution.
Episode 31
Thomas and the other engines are enlisted to deliver some newly discovered dinosaur bones, but they must deliver them in the correct order for assembly, which isn't as easy as it sounds.
Episode 32
When Gordon is unable to make an important delivery on his own, Thomas offers his help, but Gordon insists on second-guessing Thomas's every move.
Episode 33
When Thomas accidentally breaks a light he's hauling to the Sodor Festival of Lights, he learns the best way to be the No. 1 engine is to be honest after making a mistake.
Episode 34
Thomas needs repainting and must be patient as he dries, even though he feels like he's missing out.
Episode 35
Nia shows Thomas and Diesel how much unique beauty exists in Sodor, which comes in handy when they need plants to beautify a Plaza in Vicarstown.
Episode 36
When Thomas's whistle suddenly stops working, he learns that he doesn't need his whistle to still be himself.
Episode 37
When Thomas and Percy get into their first big fight they're afraid that their friendship is over... until Nia helps them figure out how to resolve it.
Episode 38
Nia has volunteered for a big day of deliveries and is determined to make the perfect plan to get it done, but when things start to go awry, she doggedly sticks to her plan and refuses any help.
Episode 39
On the last day of Yong Bao's visit to Sodor, his friends dig up a giant keepsake to help him remember them.
Episode 40
When a big storm approaches, Thomas and company must complete a week's worth of deliveries by the end of the workday, but when Sandy needs repairs, Thomas and the gang realise just how important Sandy is to the team.
Episode 41
While the trains are setting up for the Vicarstown Fall Festival, Thomas is feeling down about the end of summer and the changing weather.
Episode 42
Thomas rolls along to help Percy face his fears when he must deliver the mail on Halloween, when everyone knows the legendary Ghost Train appears.
Episode 43
When Thomas throws away Diesel's favourite oil can thinking it's trash, he makes a promise to get it back and, in the process, learns it's better not to touch things that aren't yours.
Episode 44
While playing hide and seek with Percy, Diesel accidentally gets stranded on a barge that floats out to sea.
Episode 45
Thomas and Diesel take a friendly competition too far and put an important delivery rescue at risk as they race across Sodor.
Episode 46
Percy announces he's giving up his Ghost Scaring Machine as he's too old for it now. It soon becomes clear that the machine is good for more than just scaring ghosts.
Episode 47
Thomas is elated when he finds a cowbell on the side of the tracks, until his friends start hogging it.
Episode 48
When Sir Topham Hatt's Hat blows away in the wind before making an important announcement, Thomas and his friends race around Sodor, trying to catch it. The Hat remains out of reach until they learn to work together.
Episode 49
Nia is planning a big party to celebrate the anniversary of her arrival on Sodor, but she finds that her friends don't remember her anniversary and are too busy to even talk about it.
Episode 50
When Thomas spends the day carrying rockstar idol Harold across Sodor, he gains a new perspective on just how amazing it is to be his engine-self.
Episode 51
When Skiff gets a crack in his hull, Thomas needs to move him overland to Harwick for repairs, but Skiff's land-sickness makes that challenging.
Episode 52
When Nia suggests adding a song to spice up Sir Topham Hatt's new bench unveiling, he calls upon her to write a song for the ceremony, but Nia soon finds she may have bitten off more than she can sing.
