"Thomas and Amy's Great Race" is the seventh episode of the first season.
Thomas is happy on his branch line. One day he stops at a signal near the bus depot, and meets a bus named Amy. Amy reminds Thomas of the time she took his passengers after he got stuck in the snow and Terence came to pull him out, and Thomas gets jealous. He challenges Amy to a race. Thomas and Amy speed along the branch line, each one meeting various obstacles along the way. Thomas ends up winning the race thanks to a tunnel, with Amy following closely behind. Both get congratulated, and become best friends. They hope they can have another race.