Psycho II: After years of treatment at a mental institution for th ecriminally insane, Norman Bates still can't quite elude the demands of "Mother."

Psycho III: A failed nun and a sleazy musician find the desert motel Norman Bates runs in memory of his mother.

Psycho IV: When Norman Bates is drawn to a late night radio show where he shares his views on the topic of matricide--he relives his trials as a young boy living with his widowed schizophrenic mother. These haunting memories threaten to rekindle his killing urge.