Encountering a Mysterious Ship and Unfortunate Delusion

The time is the space age, the place is a barren landscape of a rock-walled canyon that lies millions of miles from the planet Earth. The cast of characters? You've met them: William Fletcher, commander of the spaceship; his copilot, Peter Craig. The other characters who inhabit this place you may never see, but they're there, as these two gentlemen will soon find out. Because they're about to partake in a little exploration into that gray, shaded area in space and time that's known as the Twilight Zone.