The Mysterious Mr. M

Edmund MacDonald

Anthony Waldron

Pamela Blake

Shirley Clinton

Danny Morton

Derek Lamont

Virginia Brissac

Cornelia Waldron

Joseph Crehan

Dan Blair

Jack Ingram

William Shrag

Dennis Moore

Agent Grant Farrell

Richard Martin

Detective Lt. Kirby Walsh

Byron Foulger

Wetherby

Jane Randolph

Marina Lamont