The Black Box (serial) › Cast
Herbert Rawlinson
Sanford Quest
Ann Little
Lenora MacDougal
William Worthington (actor)
Prof. Ashleigh
Mark Fenton
Inspector French
Laura Oakley
Laura - Quest's Assistant
Frank MacQuarrie
John Craig
Frank Lloyd
Ian MacDougal
Helen Wright (actress)
Lady Ashleigh
Beatrice Van
Ashleigh's Daughter
Hylda Hollis
Mrs. Bruce Rheinholdt