Airdate: 11 October 2006 (UK), 5 November 2006 (US)
Thomas sees some children crowded around a snowman, unaware that it's actually a giant balloon. When the balloon's guide ropes get caught on his buffers, it keeps following him around the island, and he can't figure out why.
Tropes in this episode:
- An Aesop: If something cannot stop following you, it's important to ask someone why.
- Failed a Spot Check: Thomas completely fails to realise that the "snowman" is really a giant balloon, and it's following him because its ropes are tied to his buffers. It takes him until the end of the episode to realise.
- Reasonable Authority Figure: The Fat Controller, who calmly explains to Thomas why the snowman keeps following him.
- Rule of Three: James, Farmer McColl, and Emily all see Thomas with the snowman balloon and try to ask him why it's tied to his buffers.