Percy in the Sea is a fan-fiction Thomas & Friends episode for Season 7 created by SuperMalechi, which aired after Something Fishy.
Percy boasts to Henry about water, saying "Water is nothing for an engine in deternination". Later, Thomas warns him about at he danger sign, which Percy refuses to listen. He soon makes a plan, and forces the freight cars to give him a bump when they get to the quay. When they arrive, they push Percy past the board, and he falls into the sea. Sir Topham Hatt scoffs him for his foolishness. Later, the river cranes help to rescue Percy and Henry takes him to the works to be mended,
- Bill and Ben
- Emily (cameo)
- Salty (cameo)
- Sir Topham Hatt
- US Narrator: Ringo Starr.
- UK Narrator: Michael Angelis.