Sidney Alderman Blackmer (July 13, 1895 – October 6, 1973) was an American Broadway and film actor active between 1914 and 1971, usually in major supporting roles.
Biography
Blackmer was born and raised in Salisbury, North Carolina, the son of Clara Deroulhac (née Alderman) and Walter Steele Blackmer.[1] He started in the insurance and financial counseling business but abandoned it. While working as a construction laborer on a new building, he saw a Pearl White serial being filmed and immediately decided to pursue acting as a career. He attended the University of North Carolina at Chapel Hill.[1] Blackmer had a role in the highly popular serialThe Perils of Pauline (1914), his film debut.[2]
In 1929, he returned to motion pictures and went on to appear as a major character actor in more than 120 films.[citation needed]
In film, Blackmer had a role as the conniving Manhattan warlock Roman Castevet in the guise of one of many overly solicitous elderly neighbors of the pregnant titular character (played by Mia Farrow) in the Academy Award-winning 1968 Roman Polanski film, Rosemary's Baby.
Revenge Is My Destiny (1971) as Gregory Mann (final film role)
Blackmer also appeared in television roles, such as Don't Come Back Alive episode of the 1955 TV series Alfred Hitchcock Presents and "The Premature Burial" episode of the 1961 TV series Thriller. Blackmer also guest starred twice in the western TV series Bonanza in the episodes "The Dream Riders" (1961) and "The Late Ben Cartwright" (1968). Among his most notable roles was the character of presidential candidate William Lyons Selby in the Outer Limits episode "The Hundred Days of the Dragon".