In Scotland Yard Cold Cases, this episode, starring newcomer Liz, is entitled “Inspiration”!
A novel writer decides that he cannot write his thriller about a serial killer without doing some in depth research. So, he invites a young lady over to his apartment to experience what it is really like to kill a woman… for real! Once she’s lulled into a false sense of security, he slips on a pair of surgical gloves and seizes her by the neck. He strangles her until she’s dead, then wraps her body in plastic for disposal. Now, he has his inspiration for his novel!