The Adventures of Black Beauty (1972)

S2E19 A Long Hard Run

T. Otis Waygood and Dolly come to the village, where Dolly, despite Jenny’s protests, decides to take Beauty out for a quick ride. The squire finds this fascinating and organizes a race between Jenny and Dolly. Meanwhile, Ned spots the suspicious Waygood from his past in London and starts to question his intentions.