Astra Film Corp was an American film production company that produced silent films. Louis J. Gasnier was the company's president. George B. Seitz co-founded it. It was making films by 1916. It became Louis J. Gasnier Productions after Seitz left.

Mystery of the Double Cross is a 1917 film and one of the few American silent action film serials to survive in complete form. It was directed by Louis J. Gasnier and William Parke, from a story written by Gilson Willets, produced by the Astra Film Corporation and released in weekly chapters by Pathé, starting March 18, 1917.