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             The Great Radium Mystery 
            Also known as The Radium Mystery in the USA; ラジウムの秘密 in Japan 
            (1919-1920) United States of America 
            B&W : Serial / 18 chapters / 36 reels 
            Directed by Robert B. Broadwell and Robert Hill (Robert F. Hill) 
            Cast: Eileen Sedgwick [Gloria Marston], Cleo Madison [Countess Nada], Robert Reeves (Bob Reeves) [Jack Turner], Robert Kortman [‘The Buzzard’], Edward Brady (Ed Brady) [Frank Bird], Jeff Osborne (Jefferson Osborne) [John Marston], Robert Gray [‘The Hawk’], Gordon McGregor [‘The Rat’], Fred Hamer 
            Pacific Producing Company production; distributed by The Universal Film Manufacturing Company, Incorporated. / Scenario by [?] Frederick Burnett or Frederick Bennett? Presented by Carl Laemmle. / 18 chapters (two reels each): [1] “The Mystic Stone,” released 13 October 1919; [2] “The Death Trap,” released 20 October 1919; [3] “The Fatal Ride,” released 27 October 1919; [4] “The Swing for Life,” released 3 November 1919; [5] “The Torture Chamber,” released 10 November 1919; [6] “The Tunnel of Doom,” released 17 November 1919; [7] “A Flash in the Dark,” released 24 November 1919; [8] “In the Clutches of a Mad Man,” released 1 December 1919; [9] “The Roaring Volcano,” released 8 December 1919; [10] “Creeping Flames,” released 15 December 1919; [11] “Perils of Doom,” released 22 December 1919; [12] “Shackled,” released 29 December 1919; [13] “The Scalding Pit,” released 5 January 1920; [14] “Hemmed In,” released 12 January 1920; [15] “The Flaming Arrow,” released 19 January 1920; [16] “Over the Cataract,” released 26 January 1920; [17] “The Wheels of Death,” released 2 February 1920; [18] “Liquid Flames,” released 9 February 1920. / Standard 35mm spherical 1.33:1 format. 
            Drama. 
            Survival status: The film is presumed lost. 
            Current rights holder: Public domain [USA]. 
            Keywords: Serials 
            Listing updated: 4 May 2020. 
            References: Lahue-Continued pp. 68, 193-194, 285; Stedman-Serials p. 47 : Website-IMDb; Website-SerSq. 
            
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