The Secret Kingdom
B&W : Serial / 31 reels
Directed by Theodore Marston and Charles J. Brabin
Cast: Charles Richman [Prince Philip, also known as Phil Barr], Dorothy Kelly [Madame Savatz], Joseph Kilgour [the prime minister], Arline Pretty [Princess Julia], William R. Dunn [Juan], De Jalma West [Count Ramon], Ned Finley, Charles Wellesley, Robert Whitworth
Star Film Company (The Vitagraph Company of America) production; distributed by [?] The Vitagraph Company of America or V-L-S-E, Incorporated? / Scenario by Basil Dickey, from a screen story by Louis Joseph Vance. Stunt coordinator, Edward Wentworth. / 15 episodes (two reels each):  released 25 December 1916 (three reels). / Standard 35mm spherical 1.33:1 format.
Survival status: The film is presumed lost.
Current rights holder: Public domain.
Listing updated: 1 October 2009.
References: Lahue-Continued pp. 51-52, 182, 288; Stedman-Serials p. 47 : Website-IMDb; Website-SerSq.