During Marlowe's 30-year career he would appear in over 200 feature films, as well as dozens of television shows.

[16] The 1950s would see Marlowe continue his numerous film appearances, while he would also branch out into the new medium of television.

[22] Although the Internet Movie Database has him appearing in two films in 1961, AFI has his final film appearance as one of the taxi drivers in Hitchcock's classic thriller North by Northwest in 1959, starring Cary Grant, Eva Marie Saint and James Mason.

[2][23] Interspersed with his film performances, Marlowe would make dozens of television appearances.

His TV work included guest roles on: The Abbott and Costello Show, Adventures of Superman, The Millionaire, Dragnet, Perry Mason, and Alfred Hitchcock Presents.