The Return of Boston Blackie

Strongheart

Strongheart the Dog

Bob Custer

Boston Blackie

Corliss Palmer

Sylvia Markham

Rosemary Cooper

Necklace Nellie

Coit Albertson

Denver Dan

William Worthington

John Markham

Florence Wix

Mrs. John Markham

J.P. Lockney

Rob Nichols

Violet Palmer

Annette