Boris Karloff. Boris Karloff was 47 in The Black Room as 'Baron Gregor de Berghman / Anton de Berghman'.
Marian Marsh. Marian Marsh was 21 in The Black Room as 'Thea Hassel'.
Robert Allen. Robert Allen was 29 in The Black Room as 'Lt. Albert Lussan'.
Thurston Hall. Thurston Hall was 53 in The Black Room as 'Col. Paul Hassel'.
Katherine DeMille. Katherine DeMille was 24 in The Black Room as 'Mashka'.
John Buckler. John Buckler was 29 in The Black Room as 'Beran - the gypsy'.
Henry Kolker. Henry Kolker was 60 in The Black Room as 'Baron de Berghman'.
Colin Tapley. Colin Tapley was 28 in The Black Room as 'Paul Hassel as a young lieutenant'.
Torben Meyer. Torben Meyer was 50 in The Black Room as 'Peter, the majordomo'.
John George. John George was 37 in The Black Room as 'Inn Waiter (uncredited)'.
John Bleifer. John Bleifer was 33 in The Black Room as 'Franz - Captured Assassin-Villager (uncredited)'.
Marion Lessing. Marion Lessing was >> in The Black Room as 'Maria the Chambermaid'.
George MacQuarrie. George MacQuarrie was >> in The Black Room as 'The Judge'.
Robert Middlemass. Robert Middlemass was 51 in The Black Room as 'The Prosecutor'.
Edward Van Sloan. Edward Van Sloan was 52 in The Black Room as 'Doctor'.
Roy William Neill. Roy William Neill was 47 in The Black Room as 'Director'
Allen G. Siegler. Allen G. Siegler was 43 in The Black Room as 'Director of Photography'Arthur Strawn. Arthur Strawn was >> in The Black Room as 'Story, Screenplay'Richard Cahoon. Richard Cahoon was 29 in The Black Room as 'Editor'R. H. Bassett. R. H. Bassett was 56 in The Black Room as 'Music'Louis Silvers. Louis Silvers was 45 in The Black Room as 'Music'Stephen Goosson. Stephen Goosson was 46 in The Black Room as 'Art Direction'Jack Cosgrove. Jack Cosgrove was 33 in The Black Room as 'Matte Painter'
Edward Bernds. Edward Bernds was 30 in The Black Room as 'Sound'Fayte M. Browne. Fayte M. Browne was 39 in The Black Room as 'Camera Operator'Gert Andersen. Gert Andersen was >> in The Black Room as 'Assistant Camera'