The New Adventures of Lassie - Season 2 Episode 10 Old Doc Dudley
Overview: While helping establish a new nature preserve on the edge of the Park, Zoe, Harvey and Lassie meet the scientist, Doctor Dudley, an eccentric recluse who has recently moved to the valley. Convinced the whole scheme is a fraud, the doctor is reticent about the project and refuses to sell his land to the environmental organization behind the nature preserve.