S1, E3: Autumnis when many of the park's resident animals prepare for the onset of winter. This year it is mild and dry. Which is good for the park's red deer calves as they fatten up. But it's not so good for the red deer stags. This is the time of the red deer rut; when stags battle for the right to breed. There's tension in the air as they wait for the right conditions for it to start.