Complex sentence: Psychologist Charles Marlowe (Christopher Lee) invents a drug which will release his patients' inhibitions-but when he tests it on himself he becomes cruel, immoral Edward Blake who descends into crime and eventually murder.
Split into simpler sentences: Psychologist Charles Marlowe (Lee) invents a drug which will release his patients' inhibitions. When he tests it on himself, he becomes the evil Edward Blake, who descends into crime and eventually murder.