Rosie and Jennifer is the twenty-fifth episode of the sixth season.
Mr. Hatt sends Thomas to the mainland to help out at Bridlington Goods Yard. He then makes Rosie and Jennifer work together at the Ffarquhar Quarry. Jennifer and Rosie don't get along, and Rosie ends up speeding away from the Quarry after overhearing Jennifer sing "It's Over, Isn't It". Jennifer chases after her, and they end up running into Mavis, who makes them return to the Quarry. They take the final stone train of the Docks, and stay there for the night. While there, the two make up and become friends.
- Richard Hatt
- Salty (cameo)
- Henrietta (cameo)
- Cranky (cameo)
- Toby (mentioned)
- Annie and Clarabel (mentioned)