In Star Trek, why does Capt. Christopher lose his memory when the Enterprise beams him into his fighter jet?
In the Star Trek episode, " Tomorrow is Yesterday ," the USS Enterprise is thrown back in time to the 20th Century of Earth. The crew saves the life of an Air Force pilot , Captain John Christopher, by beaming him aboard. Fearing Christopher could disrupt the timeline if returned to Earth after glimpsing the future, Kirk decides Christopher must stay with the Enterprise. After Science Officer Spock later discovers that the pilot's own as-yet-unborn son will play an important role in a future space mission to Saturn, Kirk realizes he must return Christopher to Earth, but without any knowledge of Enterprise or other future events. When the Enterprise moves forward in time again, it beams Christopher back into his F-104 fighter jet at the very instant after he was beamed off his jet. When Christopher returns to his fighter, he has no memory of being aboard the Enterprise . Why does he have no memory of events aboard the Enterprise ? This seems like a plot hole to me. (Or a...