Howard was not only an accomplished actor on stage and screen, he appeared many times on radio as well. Howard began his career on radio in the early 1930s when he performed dramatic readings for "The Yardley Program." Not much is known about the programme because the recordings have been lost, but references to the show can be found in fan magazines of the time and the show is listed in "The New York Times" radio programme guide. Howard was also a guest performer on such shows as "The Rudy Vallee Show/Fleischmann's Yeast Hour, Lux Radio Theatre, The Silver Theatre, The Magic Key of RCA, Your Hit Parade" and "Kraft Music Hall with Bing Crosby".