Characters played by Bert Lytell
Boston Blackie
Characters played by Rhea Mitchell
Mary
Characters played by Rosemary Theby
Mrs. Wilmerding
Characters played by Joey Jacobs
'Little Pal' Martin Wilmerding Jr.
Characters played by Howard Davies
Donald Lavalle
Characters played by John Burton
Jackson - The Butler
Characters played by Frank Whitson
Martin Wilmerding