Russell Hayden

Rod Stanton

Jane Adams

Marjorie Elmore

Keye Luke

Tal Shan

Lionel Atwill

Sir Eric Hazarias

John Eldredge

Doctor Elmore

Jack Mylong-Münz

Mr. Malborn

Helen Bennett

Indra

John Gallaudet

Professor Grebb

Dick Curtis

Henchman Johnson

George Lynn

Henchman Marlow

Ted Hecht

Doc Harris

Frances Chung

Lakana Shan

Gene Roth

Police Captain Hammond

John Miljan

Doctor Gaffron

Ralph Lewis

Kurtz, gang radioman

Arthur Space

"System" Reeves

Sam Flint

Chairman of the Peace Foundation

George Eldredge

Bowen, Peace Foundation Member

Wheaton Chambers

Peace Foundation Member #2

Mauritz Hugo

Peace Foundation Member #3

Cyril Delevanti

Representative to the Peace Foundation [Ch.1]

Frank Lackteen

The Blind Beggar [Chs. 4-5, 7, 10-12]

Clarence Lung

Chief Tonga [Chs. 11-12]