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.

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.

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.

When Thomas builds an obstacle course for his friends, he gets upset when they won't play with it his way.

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.

When Kana's power goes out during a delivery run, Thomas teaches her that sometimes it's okay to go slow.

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.

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.

When Thomas borrows Percy's lucky bell for a dangerous delivery, Thomas accidentally loses the bell.

When Sandy learns about a massive shipment of sand that needs to be delivered, she is determined to help despite her size.

When the trains must deliver in pairs, Thomas is disappointed to be paired with Diesel instead of his BFF Percy.

Thomas and Percy volunteer to deliver a herd of cows, but the cows keep wandering off on their own adventures.

When music-lover Nia gets stranded before a big concert she's been waiting to see, Thomas brings the concert to her.

Thomas misunderstands the Backwards Day game and accidentally delivers the wrong cargo to the wrong places.

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.

When a parade balloon Nia is set to deliver flies away, Thomas helps Nia adjust her plans to get it back.

When Percy loses Nia's parade flag before the big parade, Thomas helps them search for it before the event begins.

Kana is upset when she keeps running out of power, but a mystery scavenger hunt is just the thing to cheer her up.

Thomas pretends to be a hero to help ensure the movie screen Nia's delivering arrives clean and pristine.

Percy feels anxious about spending a night away from home during an overnight delivery with Thomas and Nia.

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.

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.

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.

When Thomas' No.1 gets covered by paint, Diesel's comment about Thomas not being number one any more causes him to doubt himself.

The engines look forward to the roller-coaster at the Vicarstown Carnival, all except for Percy, that is, who's a bit afraid.