A Teutonic scientist attempts to create a race of artificially created superman who, among other things, can jump a few seconds through time, but only as invisible witnesses to the future goings-on. The story is disturbingly prescient of Nazi ideas of an Aryan Herrenvolk.

When salesman Ralph Carson Drake tries to recover his missing memory of the past two weeks, he discovers he had interactions with three people: a woman named Selanie Johns who sold remarkable futuristic devices for one dollar, her father, and an old gray-eyed man who is feared by Selanie and her father.

Van Vogt combined this with two other stories and a little fix-up material for his 1970 publication of Quest for the Future.

By the time that Lessa of Ruatha Hold becomes Weyrwoman of the only remaining dragon weyr, the end of all Pern seems imminent since a single weyr is not enough to fight off the falling threads from the Red Star.

“Dragonrider,” which was first released as a two-part Analog serial (December 1967 and January 1968), was the second Pern story, appearing after the shorter novella “Weyr Search” (October 1967). Together, the two stories formed the first Pern novel, Dragonflight (1968). When the online version of the ITTDB was in a nascent stage, my friend Allison Thompson-Brown reminded me that the dragons can travel to a new when as well as a new where, and that time travel first appeared near the end of “Dragonrider.” Time travel on Pern occurs in a single, static timeline, so the dragons and their riders can never change anything known to be certain in the past.

By the time that Lessa of Ruatha Hold becomes Weyrwoman of the only remaining dragon weyr, the end of all Pern seems a possibility since a single weyr is not enough to fight off the falling threads from the Red Star.

Allison Thompson-Brown reminded me that dragons can go when as well as where, and the travel through time always results in a stable time loop, so that dragon travel can never change anything known to be certain in the past. The actual whening part (or going between time, as it’s called) didn’t come until the third installment (Part 2 of “Dragonrider” in the Jan 1968 Analog), but I’ll date the concept back to the slightly earlier appearance of the first story (“Weyr Search” in Oct 1967). The two stories were fixed up into the first Pern novel, Dragonflight, in July of 1968, but it was another ten years before I discovered it.

Yes, we see minor time phenomena when Picard and other members of the crew vividly experience moments and beings from their pasts, possibly created by their thoughts, but the real import of the episode is the introduction of The Traveler, who among other things is able to alter spacetime and is always on the lookout for promising individuals such as Wesley Crusher.

Sixteen-year-old Gwendolyn Shepherd [Gwyneth in the English translation] always seems to be in the shadow of her cousin Charlotte Montrose, just because Charlotte—born the day before “Gwenny”—is prophesized to be the twelfth and final carrier of a rare time-travel gene passed down through the centuries. But Gwenny doesn’t mind, as she can’t think of anything worse than Charlotte’s carefully prescribed upbringing and the prospect of dizzy spells sending her uncontrollably through time. As the first book of the tightly connected Edelstein Trilogy, the plot plods through Gwenny’s anxious awakening to complicated family mysteries and to her feelings for the pompous Gideon de Villiers, aka time traveler #11.

Apart from amusing blustering from the Count during her trips to the 18th century, time travel took a back seat to Gwenny’s on-again-off-again romance with Gideon in this second book of the trilogy. Gwenny’s new pal, the ghost/demon/gargoyle Xemerius, was enjoyable, though we wish that he would be time traveller #13.

Seventeen year-old Saira Elian’s mother has disappeared, as she does for a few days every couple of years. But this time, Saira ends up searching for her—in time. Along the way she makes friends for the first time in her nomadic life, and she learns that Vampires, Seers, and Shifters are real. But she also makes enemies, including Jack the Ripper.

Somewhat self-absorbed 16-year-old Anna Green manages to fall for the first time traveler she ever meets, not realizing that he’s a time traveler or that he’s hoping his mission to 1995 will be a short-term affair.

Turns out the Luke is one of the few people on Earth who didn’t get involuntarily evolved into a time traveler.

Of the 43 children born 1 October 1989 with no gestation period, the eccentric and sometimes cruel billionaire Reginald Hargreeves brought up seven of them and turned them into the super-powered group called the Umbrella Academy when they developed powers. Nearly thirty years later, after Hargreeves dies, the five surviving members of the group gather at their family home. Oh, and: Number Six died some time ago and only Number Four can see him; Number Five disappeared about seventeen years ago, but he’s back (and in his 13-year-old body) after living 45 years in a post-apocalyptic future that’s scheduled to start in eight days.

When 13-year-old Corey Fletcher first finds himself transported back in time, he doesn’t realize how it happened or that he is one of the rare travelers who can actually change the timeline, rescue his Papou, and maybe even save his grandma from 9/11.

Ren (Alexandra Reynolds) owns a neighborhood bar in Baltimore. One evening, Edgar Allan Poe stumbles in—not an early Halloween reveler in costume, but the real thing. In the course of their acquaintance, both Ren and Poe learn more about themselves. Did I mention that Ren is descended from a freed slave mother and a white slave-owning father? And that Poe was an anti-abolitionist?

Five’s plan for the Umbrella siblings to escape the apocalypse by going into the past ends up scattering them throughout different years of Dallas in the 1960s. They manage okay on their own until shortly after 11/22/63, when secondary effects from changes to the timeline cause a nuclear holocaust that can be averted only by recently arrived Five jumping back to 11/15/63 to exert his unique charm into getting the gang to work together.

After stopping the JFK-induced apocalypse in Season 2, the six Umbrella siblings return to 2019 where they no longer exist and their still-living father has founded The Sparrow Academy in their stead.