​From Wikipedia, the free encyclopedia.   Robert Mandan (born February 2, 1932 in Clever, Missouri) is an American actor, most famous for his portrayals of playwright David Allen on the NBC serial From These Roots from 1958 -1961, businessman Sam Reynolds serial Search for Tomorrow from 1965 to 1970, and his subsequent satire of the genre playing Chester Tate on the sitcom Soap from 1977 to 1981 on ABC. During his time on Search for Tomorrow, he appeared in the the Broadway musical Applause. He...