Perchance to Dream - S4.E17

Jeff Morgan reads a story in a pulp fiction magazine exactly like one he'd written and filed away years earlier. His meeting with the author, Frank Joyce, is eerie; he already knows everything about the man without having met him before. Convinced Frank is his doppelganger, Jeff panics when he dreams Frank steps onto an elevator that malfunctions and plunges fifteen stories. Frank just scoffs at his frantic warning.