Hickory Dickory Doom because it really pulls out the stops. Sagamore Cottage. When I think back though RMT was more suspenseful than scary though they did have some scary ones but for truly scary episodes I would say The Hermit's Cave was one of the best radio dramas for that genre; all episodes were creepy and most dealt with the super natural. But for CBS RMT was the best out there due to when it was done, how long it lasted, and the high quality. RIP HB.