Lady Hatt's Birthday Party

"Call yourself a car? You're a disgrace to the road! Find yourself a scrapyard!"

- George

Lady Hatt's Birthday Party is the fourth episode of the fifth season.

Plot
It's Lady Hatt's birthday and the Fat Controller is leaving work early to attend the party at Kirk Ronan. When his car becomes stuck in a pothole, the Fat Controller hitches a lift in Caroline, but the small car breaks down and when George comes along he is given the job of transporting the Fat Controller, who quickly becomes covered in oil from George's engine. George loses control and crashes into a pond, and the Fat Controller is catapulted into the waist-deep mud. Thomas, luckily, is nearby and the Fat Controller acts as Thomas' "relief" fireman. The Fat Controller arrives on time, and the amused guests are quick to make good humour of the Fat Controller's adventure.

Characters

 * Thomas
 * Percy
 * Bertie
 * Caroline
 * George
 * Sir Topham Hatt
 * Lady Hatt
 * Jem Cole
 * James (cameo)

Trivia

 * During the scenes where the Fat Controller rides in his car and Caroline, music is heard in the US version but not the UK version.
 * In the US version, the sounds made by the Fat Controller's car, Caroline, and George are barely audible.
 * One of the flowers the Fat Controller buys is really a stem of broccoli.
 * George's driver is Jem Cole.
 * This is the first and only episode to have the Fat Controller as the lead character.

Goofs

 * When Caroline overheats, she lurches backwards and overheats again in slow motion.
 * Bulgy's Bridge has rails underneath it.
 * Lady Hatt's hair is brown at the party, although she could have dyed it for the party.
 * When Lady Hatt says "I didn't know it was fancy dress" one of the people laughing is missing their eyebrows.
 * Nothing is said about the Fat Controller's car, Caroline, or George after their accidents.
 * The Fat Controller seems cleaner at the party.
 * When the narrator says that George was enjoying "rolling along the lane", he looks angry.
 * Jem Cole doesn't have any eyebrows.
 * Thomas' driver looks happy when the narrator says, "I'm afraid our fireman is taken ill."
 * When the narrator says, "Later that day, the Fat Controller changed into his new suit", The Fat Controller is missing one of his eyebrows.
 * How did Thomas get to the water tower without his fireman?