AU The Borg Sphere has opened a temporal vortex into Earth's past, to 2063, a day before First Contact with the Vulcans. The Enterprise crew have to fight a battle with Borg and ensure Zefram Cochrane completes his warp flight. But it soon becomes apparent something is very wrong, or right.

L'Enterprise accoglie un'umana del passato. orami a bordo da due anni si è abituata ma ha nostalgia di casa. Settembre la trova riportandola nel passato. dovrà decidere se restare nel passato o tornare nel futuro.

The Xindi attack changes everything for Earth. For the first time, Earth and humanity is threatened by an alien race who plan to destroy the planet. But time travellers have no intention of that happening.

With the Terra Prime mess sorted out, Archer and his crew have been sent back to the Delphic Expanse to properly explore the region. During their time they are accidentally sent back to witness Cochrane's first warp flight... and learn startling revelations.

Trip asks Jon about his middle name only to find a shocking truth about his husband's family history *Posted on AO3*

Mr Pem has a visit from someone whom he does not like... but he gets an unexpected offer.

So many possibilities exist, creating nexus points where moments that could have happened become reality, and the Earth-Minbari war is no exception. And now a time traveller from the Temporal Cold War has opened up a new front.

After the Apollo missions in the 60s and early 70s, space exploration began to be rare, but what if it received a revival and sparked off the construction of a base on the moon? The Temporal Cold War has found Moonbase Alpha as a potential battleground.

In this new crossover story, I'm using the characters from all the installments of Star Trek, beginning with Enterprise, to help Jack Bauer thwart the terrorist attacks in Los Angeles.

When Harriet Potter wakes up on her birthday to white hair, blue skin, and antennae of all things, she quickly realizes something is amiss. On a journey to find her father, she begins a quest of self-discovery, love, family and hope. As a wise man once said, to appreciate the beauty of a snowflake, it was necessary to stand out in the cold. Fem!Harry. Andorian!Harry. Dad!Shran.

The Temporal Cold War is a multi timeline event, stretching across dozens of points of time, not only found in the 22nd century. In one of those timelines, a time traveller breaks into the Odyssey's Asgard core. Paradoxes like that are worth getting up in the morning

AU History for the 22nd-century changes beyond recognition as Captain Archer and his crew stumble across a ship from the future. A ship that has passed between the barriers of reality. The Federation starship USS Defiant.

A catastrophic incident has upset the balance of the multiverse. Now the end of everything, of all existence across the entire multiverse, is on the verge of happening and it's up to the last Time Guardian to travel across the multiverse and recruit the necessary players to start setting everything to rights. A nearly impossible task that will most likely kill him or his recruits,

Archer finally learns how far history has been altered. Spoilers for 'Regeneration' and 'Star Trek First Contact.' But one question is on his mind; is his mission meant to be happening?

Time travel has been said to have changed the destinies and lives of everyone in the Alpha Quadrant.

Returning to their own time after foiling the Borg's attempted assimilation of Earth before the First Contact with the Vulcans, Picard and the rest of the crew of the Enterprise E discover a horrifying truth.

On the final jump to Earth, the Yamato is sent not only to another time, but to another universe who's Earth is at war with another race

AU A brilliant scientist dying from cancer pushes the boundaries of survival when he's dying of cancer. Splicing into his body cybernetics, he discovers a way he can survive and he finds power in it. Power he wants the human race to share, believing at the same time it will help humanity grow... whether they want it or not. The Cybermen are here.

The Adama family tree has another branch and this one is a doozy

Cey's mission is complete. But the Xindi are still out there. Not willing to abandon the Enterprise on their mission to save the human race, she returns to aid them. / Takes place during S3E21 (spoilers). Sequel to my story "Star-Crossed" but stands well on its own imo.

The second part of my new series. Normal warnings apply.

Ever since the ill-fated Outbound Flight Project, the Republic's been hesitant to push any further into Wild Space and the Unknown Regions. But the Senate has authorized a second exploratory initiative under the newly-formed Republican Exploratory Service and Captain Fonrui and his ship jump into an unassuming star system, only to make contact with an interesting bunch of natives.

Ambassador T'Pol advises her young intern Sarek about the complications of human culture.

In 2149, a Stargate is discovered buried beneath the sands of Egypt, marking the most important discovery for Starfleet and Earth since Zefram Cochrane's first warp flight. Now Earth and a loose coalition of allied races must make their stand against the Goa'uld - or be utterly destroyed.

When the Enterprise rescues a woman and her crewman from a Xindi attack, they are given the information they need to find the Xindi weapon they've been searching for. But who is this woman and why would she help them? Replaces Season 3, Episode 6: Exile Takes place fully in the ST universe. No knowledge of TES universe required.