The Black Box

Herbert Rawlinson

Sanford Quest

Ann Little

Lenora MacDougal

William Worthington

Prof. Ashleigh

William Worthington

Lord Ashleigh

William Worthington

Lady Ashleigh

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Mark Fenton

Inspector French

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Laura Oakley

Laura - Quest's Assistant

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Frank MacQuarrie

John Craig

Frank Lloyd

Ian MacDougal

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Helen Wright

Lady Ashleigh

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Helen Wright

Mrs. Reinholdt

Beatrice Van

Ashleigh's Daughter

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Hylda Hollis

Mrs. Bruce Rheinholdt