Donald Hood Keefer was an American actor known for his versatility in performing comedic, as well as highly dramatic, roles. In an acting career that spanned more than 50 years, he appeared in hundreds of stage, film, and television productions. He was a founding member of The Actors Studio, and he performed in both the original Broadway play and 1951 film versions of Arthur Miller's Death of a Salesman. His longest-lasting roles on television were in ten episodes each of Gunsmoke and Angel.