Heartwarming / The Railway Series

The Three Railway Engines
  • "Edward, Gordon, and Henry":
    • There's the moment where Henry is let out of the tunnel after The Fat Controller asks him to pull the heavy express.
    • In the ending, Edward and Henry take Gordon back to the sheds, thus cementing the three's friendship.

Main Line Engines
  • In "Buzz, Buzz", Duck's dislike for diesels was remedied after BoCo came to the sheds and revealed that he was a friend of Edward.
  • "Edward's Exploit":
    • Edward, who's often mocked for being the oldest engine, uses everything in him to pull a train after a serious breakdown. He shows up late at the station, but the passengers are so proud of him that they give him a round of applause.
    • There's also Donald and Douglas being the last of the engines to accept BoCo into the family.

James and the Diesel Engines
  • In "Deep Freeze", James becomes more accepting of diesels after one of them had helped him after his injector fails.

More About Thomas the Tank Engine
  • In the ending of "Drip Tank", there's Thomas apologizing to Percy for his behavior towards him throughout the start of the book, especially when calling him a drip. Even more heartwarming when he asks that both of them can be friends again, which makes Percy happy.