Unlike in the original short story of “The Twonky,” the movie’s mad machine is a TV rather than a radio. Also, we never explicitly see the machine’s construction by a time traveler, but the professor’s discussions with the coach make it clear that they believe the machine is from the future, and that’s good enough for us. And finally, when you watch the wacky film, you’ll see that Arch Oboler devised a different fate for the Twonky than that of Kuttner and Moore’s original story.

Professor Fallon’s research into artificial suns may not be taken seriously today, but there are other times where it could be the very thing that’s needed.

Captain Nova Kester travels back from a devastated future to warn an energy mogel about the impending climate cataclysm, but only young Nas takes her seriously. That happens when time travel causes you to revert to 12 years old.

A despondent Captain Pike considers warning two future cadets about the accident that will kill them and maim Pike himself, but before he can write to them, his older self shows up to transport young Pike to the future that the warnings will create.

A mysterious, bloody man appears and warns La’an of an attack in the past, after which she races to the bridge, only to find herself in an alternate timeline with a young James T. Kirk at the helm. A trip to the past seeems in order.