Brown had significant roles in numerous popular radio shows, showcasing his impressive acting range. He played the role of "John Doe" in the Texaco Star Theater's adaptation of Fred Allen's Allen's Alley, a character that would become synonymous with the iconic comedian. Additionally, he portrayed Al, the love interest of Irma, in the radio series My Friend Irma, as well as both Gillis and Digby "Digger" O'Dell in The Life of Riley, a role he reprised for the initial television iteration of the show.
Brown's impressive repertoire also included performances as Broadway in The Damon Runyon Theatre and Thorny, the neighbor, in the radio version of The Adventures of Ozzie and Harriet. His most iconic role, however, is arguably Broadway, a character that has become deeply ingrained in popular culture. It is a testament to Brown's exceptional talent that he was able to bring this quintessentially American character to life, despite being an Englishman himself.
Beyond his impressive radio work, Brown appeared in several notable films, including Strangers on a Train (1951),where he played the role of an inebriated professor alongside Alfred Hitchcock. He also had uncredited roles in The Day the Earth Stood Still (1951) and The Wild One (1953). Furthermore, he supplied the voice of Ro-Man in the 1953 cult science fiction film Robot Monster, a testament to his versatility as an actor.
