When experimenting with time travel, it's really not a good idea to be distracted by the songs playing in the radio. Especially when you use to sing them. Yeah, he really needs to work on his aim. A one-shot of when Barry travelled back in time to his old high school days at Dalton Acadamy when he was Sebastian Smythe... And met himself. Rated T for mild language.

Sebastian and Barry were never close brothers, this only got worse after their mother's murder. So when Sebastian takes it upon himself to visit Central City nothing good could come of it. Allen twins!AU No pairings.

When Barry accidently gets stuck on Earth 3 again and requires Kara's help to get back, she agrees on one condition. He'll take her with him to go visit his friends on Earth 1. Luckily for Team Flash, they have Supergirl to help them deal with a dangerous villain. Will Barry and Kara come out as good friends, or maybe something more?

"It can never be just 'nothing' in this city, Kiera. Plenty of strange things happen around here on a regular basis." In National City, all sorts of strange things happen, but when a dimension-travelling speedster reawakens a villain's vendetta, the city is thrown into a state confusion. Supergirl must decide if this new hero is a threat or an ally. Barry must find a way home. (AU)

/ - And Barry Allen knows, there will come a day, when he'll have to choose between risking the fate of both their worlds, and the chance to see Kara Danvers for just one more day. - / In which they're madly in love and more, but are separated by worlds and dimensions apart.

After Patty breaks up with Barry he decided to visit an old friend in National City: Kara Danvers aka Supergirl. Will Kara and Barry find something new in each other, something beyond friendship. (Barry/Kara)

Kara Danvers hung up her cape and walked away from National City after a heartbreaking tragedy made her feel like she was no longer fit to be Supergirl. Do heroes ever really get to retire, though? When she finds a new job in Central City she bumps into none other than Barry Allen. Watch them form a bond of understanding, friendship, and maybe even something more? Kara/Barry

This is a "What if?" story that explores how Barry and Kara might have interacted had they existed in the same universe and become superheroes at around the same time. I like to think of it as yet another one of the Earths chugging along in the multiverse: largely the same except when it's not.

Barry finds himself distracted from Zoom when he leaves to find Kara's counterpart on his Earth. But when he does find her, she's a very different Kara to the one he met. There's more to Kara Kent and the little town of Smallville than meets the eye. Is Barry ready for this? Are Barry and Kara meant for each other the same way their counterparts are? Part of the Millma Verse.

This story takes place after the Flash episode 'Flash back', and after Supergirl episode 'Manhunter'. This is my take on the cross-over. This story goes AU as far as Supergirl is concerned after 'Manhunter'. This is my first Supergirl/Flash X-over, and I hope it stays true to the characters. Please review.

After moving in to the college dorm with tech nerd Cisco he finds he has a very unexpected type of neighbour with more than one surprise. Follow as the young couple have to deal with demons from each other and much worse... College. This is a Karry fanfic ( Kara x Barry )

When Barry tries to test out his new speed, what will distract him and send him tumbling through the Speed Force to God knows where? How will Central City cope when they are a Flash down and National City has a new Icon. Karry ( Kara x Barry)

After the events of Flash's second season, Barry's life is turned upside-down when the clone of Kara Zor-El comes crashing back into his life. Discover what happens when Kara Wells learns about her past and her powers, and how Barry's feelings toward her affects their friendship. But danger always lurks for Power Girl and the Flash. - Alt. Flash season 3. Adult themes. Kara/Barry.

Kara never revealed herself, her and Alex move to Central City, she and Barry are both on Joe's team, will something happen between the two? Kara x Barry

Barry Allen was Sebastian Smythe; he thought he could keep that part of his life separate from his life now but nothing is ever that simple for him.

After regaining his powers from Blackout, the Scarlet Speedster is running once more. Everything is as usual until a woman with powers never before seen flies into his life and turns it upside down.

After losing her powers but being able to stop an armed robbery, Kara is on a personal high. That however changes when she is suddenly brought to Earth-1 by the scarlet speedster known as The Flash. Powerless and in an unknown world, Kara must learn to trust in strangers and work on how to fit in.

When Barry Allen stumbles upon National City following a fight with Zoom, he tries to blend in while finding his way home. There he meets Kara Danvers, and while a relationship develops, their superhero personas become enemies. But when Barry finds out Zoom is threatening to cease both worlds, The Flash and Supergirl are forced to team up in order to stop him.

Barry and Sebastian are separated at birth and meet by chance (some may say fate) when Barry attends Dalton Academy for his junior year of high school. Join them as they find out their true relationship to each other and as they uncover all the facts of their past. Featuring a lot of Warbler shenanigans, twins fooling that unlucky Dalton administration, and probably some heartbreak

Kara Zor-El/Danvers and Barry Allen live on two different Earths, but that hasn't stopped them from having a relationship. Or starting something new together. Karry SuperFlash

Betrayed by her own world and left for dead an old friend arrives to save Kara from death. Deciding she has had enough of risking her life for others, Kara starts a brand new life with new love and new friends, leaving Supergirl behind forever.

Misunderstood and Judged by those whom the heroes swore to protect, Barry and Kara find comfort from each other. The story revolves around two super powered individuals who discover Love, Peace and Happiness. Something that is hard to find for them. Barry/Kara

Kara will never forget her meeting with Barry Allen, the Flash from another earth. Now she is about to meet the Flash of her earth.

There were a number of times where Barry Allen had to switch into the alter ego he used in high school, Sebastian Smythe. This is a collection of the numerous times he had to do so.

In an alternate universe both Barry and Kara exist together. This is what happens when they meet in college and fall in love. Follow them, their family, and friends through life from college years to being superheroes and beyond. This is Karry Universe. Leading the Millma Verse.