| THE SECRET FOUR. 1. Behind the Mask. |
1921 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 10. The Burning Pit. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 11. The Stampede of Death. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 12. Floods of Fury. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 13. The Man Trap. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 14. The Hour of Twelve. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 15. Black Gold. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 2. The House of Intrigue. |
1921 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 3. Across the Chasm. |
1921 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 4. The Dive of Despair. |
1921 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 5. Black Waters. |
1921 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 6. The Highway of Fate. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 7. The Creeping Doom. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 8. The Flaming Forest. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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| THE SECRET FOUR. 9. The Fight in the Dark. |
1922 |
Universal Film Mfg. Co. Inc. |
2 reels |
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