Pyscho house used in episode
I was watching Duel at Parkison Town (S2, Ep12), and during a scene with old man Parkinson (Henry Hull) and his son discussing the duel, they're using the famous Bates' house from Alfred Hitchcock's Psycho as the Parkinson's home.
Researching the structure it's part of Universal Studios, and the episode was filmed at Stage 36, Universal Studios.
The oval design on the main gable is a dead giveaway, I saw it and recognized it immediately.