Johnny Kingdom watches the wildlife and meets the people of his native Exmoor through the seasons of the year. The third programme sees the arrival of Johnny's favourite time of year - autumn, the mating season for red deer. Johnny is determined to record as much as he can and begins by filming a magnificent stag with a herd of females on his friend Colin's farm. In Minehead, he helps judge the Exmoor Flag Competition, launched to mark the sixtieth anniversary of the National Park. And, as autumn draws to a close, he joins farmer Rex Milton for the annual pony round-up. They check the herd's condition and take some of the young animals off the moor. Later, they will be sold to raise money for the care of the herd and to keep numbers to a manageable level.