John Meadham (played by Jack Holt) is a protagonist in Vengeance.
Margaret Summers (played by Dorothy Revier) appears in Vengeance.
Charles Summers (played by Philip Strange) appears in Vengeance.
Ambassador (played by Hayden Stevenson) appears in Vengeance.
Nidia (played by Irma Harrison) appears in Vengeance.
Doctor (played by George C. Pearce) appears in Vengeance.
Chief (played by Onest Conley) appears in Vengeance.