StarTrek: The Original Series Crossovers
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Time and Again by TrekFANatic
An explosion of a mysterious project sends MacGyver 300 years into the future, causing a unique anomaly which the Enterprise is sent to investigate. However there are others with different plans...
Crossover - StarTrek: The Original Series & MacGyver - Rated: K - English - Sci-Fi/Friendship - Chapters: 1 - Words: 281 - Published: 2/20
Refuge by PrairieDawn
A reimagining of events occurring at the end of Star Trek: The Wrath of Khan, as experienced by the emotional personifications of Spock and Leonard McCoy. Falls somewhere between weird crossover and crackfic, and may be considered an extended metaphor. Rated T for main character death and one precision F-strike.
Crossover - StarTrek: The Original Series & Inside Out - Rated: T - English - Hurt/Comfort/Drama - Chapters: 1 - Words: 2,110 - Follows: 1 - Published: 2/20 - L. McCoy, Spock - Complete
The War on the Edge of Forever by Danzinora Switch reviews
When Dr. McCoy, overdosed on cordrazine, vanishes through the Guardian of Forever, he winds up in 1940's Germany. Kirk and Spock chase after him and quickly find themselves prisoners in Stalag 13, which holds more secrets than expected. Story idea by LittleMissSpitfire; many thanks to her and CollieandShire for letting me write this!
Crossover - StarTrek: The Original Series & Hogan's Heroes - Rated: T - English - Adventure/Drama - Chapters: 6 - Words: 15,703 - Reviews: 43 - Favs: 9 - Follows: 22 - Updated: 2/19 - Published: 9/30/2016 - J. Kirk, L. McCoy, Spock, R. Hogan
Shades of Darkness by KCS reviews
No one is more surprised than newly-resurrected James T. Kirk, when he opens his eyes to an unfamiliar crew nearly 40 years his junior. Meanwhile, young Jim finds himself trapped in the ghostly world of the Nexus, trying to find his way home as his crew search for a way to reach him before Captain Picard convinces him to leave that Valhalla to face premature death on Veridian III.
Crossover - StarTrek: The Original Series & Star Trek: 2009 - Rated: T - English - Family/Hurt/Comfort - Chapters: 6 - Words: 24,135 - Reviews: 53 - Favs: 19 - Follows: 31 - Updated: 2/19 - Published: 1/31 - J. Kirk, J. Kirk, Spock, Spock Prime
Watching the Different Past by Geegees reviews
Kirk, Bones, Spock, Uhura, Chekov, Sulu, Sarek, and Amanda are made to watch Star Trek 2009 to see if they can work towards changing this version of events and stopping them from happening. I'm not good at summarys, but I haven't really seen any stories like this before so I decided to make one. ALSO POSTED ON AO3 UNDER THE SAME NAME AND I DO NOT OWN THE CHARACTERS OR THE MOVIES
Crossover - StarTrek: The Original Series & Star Trek: 2009 - Rated: K - English - Hurt/Comfort - Chapters: 2 - Words: 3,407 - Reviews: 3 - Favs: 7 - Follows: 10 - Updated: 2/7 - Published: 2/1
Undiscovered Feelings by Seraphina Luna-Lilly Snape
I suck a summarys but it involves Data, Spock, and a few dozen OCs and a war
Crossover - StarTrek: The Next Generation & StarTrek: The Original Series - Rated: T - English - Romance/Angst - Chapters: 2 - Words: 2,025 - Updated: 1/23 - Published: 12/4/2016 - [Data, OC] [Spock, OC]
Pasadena: The Final Frontier by spirk-is-real reviews
Instead of going into Starfleet, Jim, Spock, Bones, Sulu, Chekov and Scotty they are Scientist and Doctors and Astronauts and Pilots. Jim and Spock share an apartment and Nyota moves in next door. Jim's and Spock's friends Bones, Sulu, Chekov and Scotty are geeks and dorks, they love comic books and DnD and other geeky things. So basically Big Bang Theory with Star Trek Characters.
Crossover - StarTrek: The Original Series & Big Bang Theory - Rated: T - English - Humor/Sci-Fi - Chapters: 4 - Words: 14,027 - Reviews: 3 - Favs: 1 - Follows: 2 - Updated: 1/8 - Published: 11/23/2016
The Star Trek Original Series Uchronia by Eliza Donelittle reviews
Leonard & the Big Bang Theory gang go to a fancy dress party and end up switching places with the crew of the Starship Enterprise (original series). They have to deal with the voyage of the Starship Enterprise while trying to figure out how to get home. Meanwhile Captain Kirk & crew have the same problem in The Big Bang Theory universe.
Crossover - StarTrek: The Original Series & Big Bang Theory - Rated: T - English - Humor/Sci-Fi - Chapters: 9 - Words: 17,366 - Reviews: 29 - Favs: 16 - Follows: 29 - Updated: 1/1 - Published: 10/20/2012 - J. Kirk, Spock, Leonard H., Sheldon C.
The Enterprise and the Doctor by denise3 reviews
The Enterprise, during its five-year mission under Captain Kirk, repeatedly meets a mysterious individual known as the Doctor. Amid growing threats to the Federation, they must decide whether to trust him, or not. Episode II: Investigation: The Enterprise arrives on New Sapienza looking for the Doctor, but there they'll find more than they hoped for.
Crossover - StarTrek: The Original Series & Doctor Who - Rated: T - English - Suspense/Sci-Fi - Chapters: 18 - Words: 41,161 - Reviews: 7 - Favs: 24 - Follows: 41 - Updated: 12/31/2016 - Published: 10/8/2015 - J. Kirk, L. McCoy, Spock
Beam Up Papa Bear by Basketballgirl Kaitlin reviews
When Colonel Hogan is kidnapped by Romulans sent back in time for a suicide mission, Captain Kirk, Spock, Dr. McCoy, and Scotty must return to Germany 1944 and work with Hogan's men to save him, or history will be altered forever. The two teams join sides to accomplish their assignment, struggle to gain one another's trust, and run into obstacles along the way.
Crossover - StarTrek: The Original Series & Hogan's Heroes - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 16 - Words: 36,441 - Reviews: 39 - Favs: 3 - Follows: 2 - Updated: 12/16/2016 - Published: 12/2/2016 - J. Kirk, Spock, R. Hogan, P. Newkirk - Complete
A Saga of Worlds by Lord Maximus reviews
During the return to Earth from her five-year mission the Enterprise is swept away into a distant galaxy, caught up in a battle as a tribe of humans fight to survive and escape the tyranny of an evil machine race seeking to dominate the universe.
Crossover - StarTrek: The Original Series & Battlestar Galactica - Rated: T - English - Chapters: 6 - Words: 20,301 - Reviews: 18 - Favs: 28 - Follows: 41 - Updated: 12/12/2016 - Published: 10/10/2016 - Complete
Who Trek: Into Darkness by doctor-sarah
After the events of "Who Wars: The TARDIS Awakens", the gang decide to go to Star Trek, and find themselves in a time of peace, but something is off...
Crossover - StarTrek: The Original Series & Doctor Who - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 8,557 - Updated: 12/12/2016 - Published: 10/5/2016
Tardis Adventures (version 11) by Metatron's Prophet
The Doctor is pulled into the Star Trek universe, where three crew members of the U. S. S. Enterprise have been abducted to provide entertainment for an alien species.
Crossover - StarTrek: The Original Series & Doctor Who - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,286 - Favs: 2 - Follows: 3 - Published: 12/11/2016 - J. Kirk, Spock, H. Sulu, 12th Doctor
Only Human by KCS reviews
Five times through the centuries that Spock of Vulcan was surprised by Jim Kirk's human selflessness, and one time he was not at all surprised. Gen, mainly self-indulgent fluff, H/C, angst, little bit of whatever else I come up with. Now complete.
Crossover - StarTrek: The Original Series & Star Trek: 2009 - Rated: K+ - English - Friendship - Chapters: 6 - Words: 28,246 - Reviews: 138 - Favs: 146 - Follows: 126 - Updated: 12/3/2016 - Published: 12/28/2013 - J. Kirk, L. McCoy, Spock, Spock Prime - Complete
The Enterprise (s) by squeakyhamster
Well, well... the two exact ships meet each other! Kirk and Picard... how will that turn out?
Crossover - StarTrek: The Next Generation & StarTrek: The Original Series - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 1 - Words: 362 - Favs: 2 - Follows: 4 - Published: 12/3/2016 - J. Picard, Worf, J. Kirk, H. Sulu
Enterprise the Star Ship, Warping Along by ButIHaveNoFear reviews
A landing party from the USS Enterprise loses contact with the ship while on a strange planet with animate trains, but even stranger things happen aboard the ship. Captain Kirk and his crew must regain control of the Enterprise with logic and a little magic.
Crossover - StarTrek: The Original Series & Thomas the Tank Engine - Rated: K - English - Sci-Fi/Humor - Chapters: 7 - Words: 14,163 - Reviews: 5 - Favs: 2 - Follows: 5 - Updated: 11/29/2016 - Published: 10/18/2016 - J. Kirk, L. McCoy, Spock, Thomas
Academia by Lightscales15 reviews
Sus compañeros de cuarto no se parecían en nada en absoluto a él... Tal vez funcionaria. Básicamente, lo que sucedería si James Kirk, Leonard McCoy y Spock fueran compañeros de cuarto en la Academia Estelar. AU, contiene elementos de ambos universos.
Crossover - StarTrek: The Original Series & Star Trek: 2009 - Rated: K+ - Spanish - Friendship - Chapters: 3 - Words: 3,371 - Reviews: 1 - Follows: 1 - Updated: 11/14/2016 - Published: 7/12/2016 - J. Kirk, L. McCoy, Spock
Hogan's Trek by baja-king reviews
Captain Christopher once again time travels to District XIII, intent on making Klink a hero to the Fatherland. It's up to Kirk to stop him from altering the timeline. The sequel that no one wanted.
Crossover - StarTrek: The Original Series & Hogan's Heroes - Rated: T - English - Parody/Sci-Fi - Chapters: 9 - Words: 33,817 - Reviews: 18 - Updated: 11/12/2016 - Published: 9/5/2016 - J. Kirk, L. McCoy, R. Hogan, W. Klink - Complete
Out of his shell by TFALokiwriter
What if they never served on the same ship and never became the legendary crew Star Fleet regarded? What if they all met at a nursing home? What if it Spock was in a shell of his own? Much like Jim would be. And all it took was McCoy to be there to tow them both out as much as he will regret it.
Crossover - StarTrek: The Next Generation & StarTrek: The Original Series - Rated: T - English - Humor/Hurt/Comfort - Chapters: 15 - Words: 127,739 - Follows: 1 - Updated: 10/21/2016 - Published: 8/21/2016 - [Spock, L. McCoy] J. Kirk, Uhura - Complete
Tardis Adventures (version 10) by Metatron's Prophet reviews
The Doctor picks up a new companion and ends up meeting the crew of the Enterprise while facing a sick alien species.
Crossover - StarTrek: The Original Series & Doctor Who - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 1,376 - Reviews: 1 - Follows: 3 - Published: 10/6/2016 - Spock, 3rd Doctor, OC
Unscrupulous by Susan Hilton reviews
Just for his own amusement, the Q transports Captain Christopher back to Kirk's Enterprise along with Rasmussen and encourages them to swipe a few items from a less observant original series crew, thus permanently altering history. PLEASE, I beg of you, leave a review.
Crossover - StarTrek: The Next Generation & StarTrek: The Original Series - Rated: T - English - Sci-Fi/Adventure - Chapters: 22 - Words: 27,069 - Reviews: 43 - Favs: 6 - Follows: 9 - Updated: 9/25/2016 - Published: 7/16/2014 - Q, P. Chekov, Gary Seven, R. Lincoln - Complete
Magically Illogical by Laveycee reviews
Spock goes to a Terran school and meets a girl named Llarian. They become friends, and when they turn eleven, one of them goes off to Hogwarts, while the other stays, alone. Will their friendship survive? Set during the Harry Potter books. Definitely AU. I don't own Star Trek or Harry Potter, and never will! K for now. Currently on hiatus.
Crossover - StarTrek: The Original Series & Harry Potter - Rated: K+ - English - Friendship - Chapters: 3 - Words: 1,459 - Reviews: 10 - Favs: 2 - Follows: 5 - Updated: 9/19/2016 - Published: 6/6/2012 - Spock, OC - Complete
Mirror Mirror Rebooted by courtney.d.a85 reviews
What will happen to the Crew of the USS Enterprise when their Alternate Reality gets alternated? A revision of TOS episode "Mirror Mirror"! All character with a bit of Uhura/Spock
Crossover - StarTrek: The Original Series & Star Trek: 2009 - Rated: K+ - English - Sci-Fi/Romance - Chapters: 4 - Words: 4,710 - Reviews: 2 - Favs: 5 - Follows: 8 - Updated: 9/18/2016 - Published: 8/28/2016 - [N. Uhura, Spock] J. Kirk, L. McCoy/Bones
Star Trek - Spock's Mission by Ambassador T'Raen
The USS Audacity is under the command of a Vulcan hybrid, all is well before a well known Ambassador informs them of the missing Enterprise. Their ship has been chosen to lead the search and rescue, great. Until they were sucked into the Alternate Universe. With the help of the Alt Enterprise and Two well known men can they save the Enterprise in time? AUish Sequel to Twenty Below.
Crossover - StarTrek: The Original Series & Star Trek: 2009 - Rated: T - English - Adventure/Sci-Fi - Chapters: 14 - Words: 14,006 - Follows: 1 - Updated: 9/11/2016 - Published: 9/5/2016 - J. Kirk, L. McCoy, Spock, OC
The Curse of Bodie by Marla Fair reviews
In 2269 an archaeologist digging in the ruins of the Bodie mine on Earth discovers skeletal remains dating to 1876. On the wrist of the dead man, who is wearing a green jacket, is an alien device. Its discovery sends the crew of the Enterprise into the past to Ben Cartwright's Ponderosa where the eddies of time and an alien menace are moving together to doom Ben's youngest son.
Crossover - StarTrek: The Original Series & Bonanza - Rated: T - English - Drama/Hurt/Comfort - Chapters: 17 - Words: 70,278 - Reviews: 28 - Favs: 4 - Follows: 2 - Updated: 9/10/2016 - Published: 8/29/2016 - J. Kirk, Spock, Adam C., Little Joe C. - Complete
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