Complex sentence: Knight spent most of the 1950s and 1960s doing commercial voice-overs and essaying minor television and movie roles he was the cop guarding Norman Bates at the end of Alfred Hitchcock's "Psycho" (1960).
Split into simpler sentences: Knight spent most of the 1950s and 1960s doing commercial voice-overs and essaying minor television and movie roles. He was the cop guarding Norman Bates at the end of Alfred Hitchcock's "Psycho" (1960).