Clarkson’s Farm star Gerald Cooper has been diagnosed with prostate cancer, Jeremy Clarkson confirmed in the season three opener. Cooper, 76, has become a household name thanks to his hilarious back-and-forths with Clarkson over the first two seasons but didn’t appear in the first four episodes of season three where the announcement was made. It was left to Clarkson to break the news to fans as episode one of season three drew to a close after he took a phone call while in his tractor. The details of the phone conversation were left rather vague but after Clarkson hung up, he told the camera: …