The Adventures of Black Beauty (1972)

S02E12 The Quarry

Dr. Gordon and Black Beauty rush to the quarry following a mishap that leaves several workers hurt. Afterward, the squire dismisses Lawson for his carelessness, prompting Lawson to retaliate by stealing money and horses, including Beauty. However, Beauty manages to break free and warns Jenny and Kevin, who put themselves at risk in a bid to confront Lawson and prevent further chaos.