Dear Alec Baldwin, Keir Dullea and Gary Lockwood: The actor whose name you were grasping for on Up Late with Alec Baldwin tonight is, in fact, Timothy Carey. He, and not Joe Turkel, as you eventually surmised, portrayed Nikki Arano, the hepcat racehorse assassin from Stanley Kubrick‘s The Killing (1956).
Just so’s you know. If I can be of further assistance, please advise. Otherwise, kudos for a great show!