In a review of the first Kay Kyser telecast, in 1949, critic Harriet Van Horne (of the New York World-Telegram) wrote that Marshall’s Ford commercials “are a show in themselves. And a very good one.”
After Kay Kyser’s program went off the air, at the end of 1950, Marshall was featured in the Ford commercials of the program’s replacement, the Ford Star Revue, starring Jack Haley.
From 1948 until 1954, Marshall was the host of the NBC-TV science show, The Nature of Things. As Tim Brooks and Earle Marsh note—in their superb encyclopedia, The Complete Directory to Prime Time Network and Cable TV Shows, 1946-Present (Ballantine Books, several editions)—Marshall “was one of early TV’s favorite scientists.”