11. And When the Sky Was Opened

USAF Lieutenant Colonel Clegg Forbes arrives at a military hospital to visit his friend and co-pilot Major William Gart. The two had recently piloted an experimental spaceplane, the X-20. During their voyage the craft disappeared from radar screens for a full day before reappearing and crash landing in the desert, leaving Gart with a broken leg. Forbes is agitated and asks Gart if he remembers how many people were on the mission. Gart confirms that only he and Forbes piloted the plane, but Forbes insists that a third man – Colonel Ed Harrington, his best friend of 15 years – accompanied them.

In a flashback, Harrington and Forbes are discharged from the hospital after passing their physical exams. While visiting a bar downtown, Harrington is suddenly overcome by a feeling that he no longer "belongs" in the world. Disturbed, he phones his parents, who tell him they have no son named Ed and believe the person calling them is a prankster. Harrington then mysteriously vanishes from the phone booth and no one but Forbes remembers his existence. Increasingly desperate, Forbes fruitlessly searches for any trace of his friend.

Back in the present, Forbes finishes recounting the story to Gart. He is dismayed by his friend's claim that he doesn't know anyone named Harrington. Forbes then glances at a mirror and discovers he casts no reflection, causing him to flee the room in terror. Gart tries to hobble after him only to find that Forbes has disappeared. Calling the duty nurse to ask if she saw where Forbes went, Gart is stunned by the nurse's claim that nobody named Forbes was ever in the building and that Gart was the lone man in the hospital room all along, as well as the only person who went on the space mission. As she leaves, Gart is horrified and also disappears.

An officer enters the building and asks the duty nurse if there are any unused rooms available to accommodate new patients. The nurse takes him to the now completely empty room which had hosted the three astronauts, telling him that it is unoccupied. The hangar which previously housed the X-20 is then shown, with the sheet that covered the craft lying on the ground. There is no trace of the plane, as if it and its crew had never existed.