第 15 季 共 20 集
播出时间：2011年3月2日
第 1 集 Gordon and Ferdinand
播出时间：2011年3月2日
The Fat Controller gives Ferdinand the honour of helping Gordon take the Lion of Sodor to the summerhouse. Gordon, however, gets very jealous, which causes a nasty accident on the track.
第 2 集 Toby and Bash
播出时间：2011年3月3日
Bash is rewarded by the Fat Controller for being a Really Useful Engine. His prize is to spend the day with Toby. Bash enjoys himself so much that Toby thinks his friend would like to live on Sodor. Together, the pair set out to find Dash the perfect new home.
第 3 集 Emily and Dash
播出时间：2011年3月4日
Emily is given the job of looking after Dash on a trip to the steam fair. Dash shows Emily how to make special tweeting noises with his whistle, but he does it so often, he runs out of fuel and gets stuck. Emily thoughtlessly goes on to the fair without him. Will she remember her job and come back?
第 4 集 Percy's New Friends
播出时间：2011年3月5日
Percy wants to make friends with the wild animals on Sodor, but they are frightened of him and run away. Percy realises that if he is gentle and quiet rather than fast and loud, he will stop scaring them - and he is soon covered in friendly animals.
第 5 集 Edward the Hero
播出时间：2011年3月8日
Edward is given a special job to do, so he decides that he needs to become a hero like Henry. He soon discovers that heroes come in all shapes and sizes.
第 6 集 James to the Rescue
播出时间：2011年3月9日
James rejects Toby's help and refuses to work as part of a team when Gordon needs rescuing. However, James soon has to swallow his pride and ask Toby to assist him.
第 7 集 Happy Hiro
播出时间：2011年3月10日
Thomas tries to cheer Hiro up when he sees that he does not look very happy. Hiro tells Thomas he is sad because he misses his home, so Thomas takes him on a trip to forget his woes.
第 8 集 Up, Up and Away
播出时间：2011年3月11日
Thomas and Percy are chosen to deliver a giant balloon. The wind on the coast track whips the balloon into the sky. Thomas and Percy wait for the balloon, but Gordon tells them it will not fly back, so the engines have to find another way of replacing it.
第 9 集 Henry's Happy Coal
播出时间：2011年3月12日
Henry is given the special task of taking a very important visitor around on a tour, but finds himself teased about the special coal he has to use.
第 10 集 Let It Snow
播出时间：2011年3月15日
Gordon and Thomas collect logs for an animal shelter and sing a song about snow in the hope that they can make snow clouds appear.
第 11 集 Surprise, Surprise
播出时间：2011年3月16日
Thomas' must help his friends be repaired in time for the Christmas party.
第 12 集 Spencer the Grand
播出时间：2011年3月17日
It is a very foggy day and the engines are asked to stay put until the weather clears. However, Spencer and Percy do not heed the warning.
第 13 集 Stop That Bus!
播出时间：2011年3月18日
Thomas feels sorry for Bertie, so he takes him on a tour. Bertie then realizes that he needs to go and collect a group of people and cannot be late.
第 14 集 Stuck On You
播出时间：2011年3月19日
Thomas meets Butch, who has a magnet attached to his crane arm. However, he and Butch do not listen to Victor about how to use the magnet.
第 15 集 Big Belle
播出时间：2011年3月22日
A new engine called Belle attempts to befriend Toby when she discovers that they have something in common. However, her bolshy behaviour overwhelms Toby.
第 16 集 Kevin the Steamie
播出时间：2011年3月23日
When Kevin is left in charge of the Steamworks, he decides to use the space to practise his shunting skills with disastrous results!
第 17 集 Wonky Whistle
播出时间：2011年3月24日
Thomas's whistle is broken, so he goes to the Steamworks to have it repaired. However, he rushes off on a delivery before it is properly fixed.
第 18 集 Percy the Snowman
播出时间：2011年3月25日
Thomas is charged with the important task of transporting the Fat Controller to the town square to switch on the Christmas lights.
第 19 集 Tree Trouble
播出时间：2011年3月26日
The steam engines compete against the diesels to find the best Christmas tree in Sodor. Can the trains transport the trees back to town in one piece?
第 20 集 Fiery Flynn
播出时间：2011年3月29日
A new enthusiastic fire truck called Flynn tries to impress the Diesels with his bravado, but his actions have potentially disastrous consequences.
