"The Time Element" is an installment of "Westinghouse Desilu Playhouse" that was written by Rod Serling and plays exactly like an episode of his anthology series, "The Twilight Zone", which would begin a short time after this episode aired.
The plot might seem familiar if you've seen "The Twilight Zone" episode "No Time Like the Past", where a man can go back in time to prevent disasters but time and again, no one believes him and the disasters occur anyway.
In "The Time Element", Peter Jenson (William Bendix) goes to a psychiatrist about a recurring dream. In it, he's back in Honolulu...the day before Pearl Harbor. And, try as he might to convince everyone, no one believes that the Japanese are about to commit a sneak attack on the island and thousands will die.
The twist in this one makes this an exceptional show. My only reservation in this otherwise wonderful show is that William Bendix's character just seems unusually angry all the time. When he wakes up in 1941 and is confused, his go-to emotion is ALWAYS anger...which I think detracts a bit from an otherwise amazing show. Still, it's well worth seeing!