Psycho (1960)
Original Alfred Hitchcock masterpiece was followed by a direct if very belated sequel Psycho II (1983) which is not based on a sequel of the original novel of the same name. After Psycho III (1986) franchise attempted to enter television with a spin-off Bates Motel (1987) which never took off as a TV series and established that Norman Bates, central figure of the franchise, died. However, another direct sequel, 1990's TV movie Psycho IV: The Beginning (1990) debunked that despite primarily being a prequel. There are also a notorious shot-for-shot remake from 1998 and a newer TV series which also uses the name "Bates Motel" and, while it is inspired by movies, it is set in its own continuity.