Airdate: October 27, 2010 (UK); December 19, 2010 (US)
A "snowman party" is to be held at the Town Hall, with special appearances by Farmer Mc Coll and his dog, the Brass Band, and Mr. Bubbles. Sir Topham Hatt asks Thomas to collect an important package from Knapford Station. Before leaving, Thomas notices the children building the snowman are upset because it does not have a hat for its head. Thomas promises to find one, deviating away from his job.
Along the way, he finds three hats: one from McColl Farm, one at Maron Station, and one at Maithwaite. On his way to Knapford for the package, Toby reminds him about the children, so Thomas hurries back to the Town Hall. But instead, he finds out from Percy and James that Farmer McColl, the Brass Band, and Mr. Bubbles have all lost their hats and cannot make it to the party.
Realising his mistake, Thomas rushes off to collect the package from Knapford, and then collects the guests. The package is revealed to contain a new top hat for Sir Topham Hatt, who gives his old hat to the children to use on their snowman.
Tropes:
- Rhymes on a Dime: Thomas' "I found a hat! I found a hat! The children will be pleased with that!"
- Rule of Three: Three hats were found by Thomas, which belong to Farmer McColl, the Brass Band's conductor, and Mr. Bubbles.
