The Mystery Rider
Also known as I mystiriodis heir in Greece
B&W : Serial / Ten episodes
Directed by [?] Jack Nelson and/or Robert J. Horner?
Cast: William Desmond [Winthrop Lane, also known as The Mystery Rider], Derelys Perdue [Grace Wentworth], Tom London [David Manning, also known as The Claw], Bud Osborne [Bull Leonard], Walter Shumway [Norman Wentworth], Ned Bassett [the sheriff], Syd Saylor, Ben Corbett, Slim Lucas, Jack Shannon, Bud McClure
Robert J. Horner Productions production; distributed by Universal Pictures Corporation. / Produced by Robert J. Horner. Scenario by Robert J. Horner. Cinematography by Paul Allen (Paul H. Allen). Intertitles by Bert Ames. Edited by Frank Penrock. / Ten episodes:  “The Clutching Claw,” released 25 November 1928. / Standard 35mm spherical 1.33:1 format. / [?] Website-IMDb lists the production as a 19-episode serial, likely in error. / Silent film.
Survival status: The film is presumed lost.
Current rights holder: (unknown)
Listing updated: 20 August 2017.
References: Edmonds-BigU p. 151; Lahue-Continued pp. 266, 287; Stedman-Serials pp. 30, 47 : Website-IMDb; Website-SerSq.
Home video: DVD.