As he spoke, he unbolted the door and stepped back, smiling. Like a flash, Henshaw flung himself at the door, and jerking it open, fled through. Darting down the long hall in which he found himself, he tore open another door, and before Godonoff could gather his startled wits, he hurled it open and was out! ... Finding himself in a well-lighted, well-populated street, Dr. Henshaw walked calmly away. The next day, an admiring group of reporters listened in amazement to Henshaw’s story of the kidnapping. “Godonoff’s story, the metal room, and all the rest were just staged to put me in the proper mind to divulge my secret,” he said as he finished. “The scene that I witnessed through the window was probably a cleverly designed motion picture. You know how uncannily natural these orthochromatic stereopictures are.” “But, Doctor,” interrupted one of the men: “It took nerve to open that door. How did you know that you wouldn’t find yourself in interplanetary space?” Henshaw’s eyes twinkled. “I was quite positive before I opened the door that I wasn’t in interplanetary space. In the first place, as the Russian said, if we were in free space, I couldn’t open it. Then, when the Russian designed his little show, he made two rather inexcusable mistakes. In the first place, the disc nearest me, when lighted by the sun, would have made a reflection of such an intense brilliance that I would have been unable, even, to look at it. Then again, he pictured the sky as it appears to us on earth--deep blue, and sprinkled with stars. As we know, the bluish tinge of our midnight sky is caused only by the diffusion of the faint starlight by our atmosphere. In space, the sky would appear a black of the deepest jet. Furthermore, there would be seen ten times as many stars as were perceptible from the space ship. Therefore, with these fundamental mistakes in the little drama, I was quite sure I would find a city street beyond that door.” Transcriber's note: This story appeared in the March 1930 issue of _Science Wonder Stories_ magazine.