Science fiction serial.
Herbert Rawlinson
Craig Kennedy
Marguerite Marsh
Anita Carter
Ethel Grey Terry
Cleo Clark
William Pike
Walter Jameson
Kempton Greene
Rance Dixon
Coit Albertson
Lester Mason
Joe Smith Marba
Hugh Geist / Avion (as Joseph Marba)
Donald Hall
Shelby Carter (as Don Hall)
