Theorizing that one could time travel within his own lifetime, Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished... He woke to find himself trapped in the past, facing mirror images that were not his own and driven by an unknown force to change history for the better. His only guide on this journey is Al, an observer from his own time, who appears in the form of a hologram that only Sam can see and hear. And so Dr. Beckett finds himself leaping from life to life, striving to put right what once went wrong and hoping each time that his next leap will be the leap home.

Gary Hobson thinks he may even be losing his mind when tomorrow's newspaper mysteriously arrives today giving him a disconcerting look into the future. What will he do with tomorrow's news?

The series picks up four years after the events of Terminator 2: Judgment Day with John and Sarah Connor trying to stay under-the-radar from the government, as they plot to destroy the computer network, Skynet, in hopes of preventing Armageddon.

Prematurely deceased people are given the opportunity to correct something that went wrong in their lives and thus change them for the better.

Jake Kong Jr. and Eddie Spencer Jr. are sons of the original Ghost Busters, and they work alongside Tracy the Gorilla (who also worked with their fathers). Together, they are dedicated to ridding the world of the evil ghost wizard Prime Evil and his cast of henchmen.

It's the 30th century and time travel is illegal. To help monitor and police time crimes, the Time Protection Department is founded. But when Don Dolnero and his nefarious gang manage to trick four new TPD cadets into allowing them travel to the 20th century, the four cadets are forced to pursue them for the sake of history. There, in a time foreign to them, the cadets enlist Tatsuya Asami, a young martial artist, to aid their mission. Together, these five youngsters become the Timerangers. And though they try to live as ordinary 20th-century citizens, the Timerangers dedicate their lives to stopping Dolnero and others that may follow in his footsteps, attempting to forever alter the proper timeline!

Ten years after the demise of Precrime, crime-solving is different and justice leans more on sophisticated and trusted technology than on the instincts of the precogs—individuals who able to see the future. In Washington, D.C., a man haunted by the future and a cop haunted by her past race to stop the worst crimes of the year 2065 before they happen.

Plan B offers clients the chance to travel back in time to change the past, but each alteration has unintended consequences, revealing the complexity and limitations of personal agency.

Laura Price, a local news producer in San Francisco, is helping the police to hunt down a serial killer. After the killer strikes close to home, a twist of fate allows a “Groundhog Day”-type reset, and Laura relives the week prior to the string of murders. Can she change fate and stop the killer?

Erica Strange has tons of regrets in her young life - so many she's started a list. But when she shares her list with her therapist, he undertakes an unusual course of treatment: she is transported back in time and given the chance to make different decisions at pivotal moments in her life, based on her knowledge of the here and now.

Detective Raimy Sullivan is stunned when a voice suddenly crackles through her father’s old, long-broken ham radio – it’s Frank Sullivan, somehow transmitting over the airwaves and through the decades from 1996. Separated by twenty years, father and daughter have reunited on a frequency only they can hear, but can they rewrite the story of their lives without risking everyone they love?

Set in the world of television broadcasting, Na Mi-rae travels back in time to prevent her 32-year-old self from marrying news anchor Kim Shin, thus sending her past self down a different path and enabling her to pursue the things she really wanted in life.

Odyssey 5 is a Canadian science fiction series that first ran in 2002 on Showtime in the United States and on Space in Canada.

Odyssey 5 is the brainchild of Manny Coto, who served as a script-writer and executive producer during the series run. Through his website and in interviews, Coto has expressed his interest in returning to the series at some point, either continuing it or giving it a conclusion.

This mystery-drama revolves around a newspaper reporter named Dan Vasser who suddenly begins to travel through time to change the lives of those around him. When his travels reunite him with his long-lost fiancée Livia, life with his present-day wife gets very interesting.

Do Over is an American comedy-drama/fantasy series created by Kenny Schwartz and Rick Wiener about a man who gets a chance to relive his childhood. The series, which was originally broadcast on The WB in 2002, stars Penn Badgley.

A physicist discovers a briefcase containing postdated documents and evidence which indicate he will die five days in the future.

Who has not at one time wanted to go back and change the course of events? And what if you were given a second chance, a Plan B?

Ctrl is an American comedy web series by NBC. It is the first stand-alone web series launched by a major television network. The series stars Tony Hale as a typical office-working, self-confidence-lacking nerd who discovers he can undo things in real life. It is an adaptation and expansion of the short film Ctrl Z by Robert Kirbyson, which was a winner at the 2008 Sundance Film Festival.

CTRL was spotted and developed by SXM from the original short film Ctrl Z, which was screened at the Sundance Film Festival in 2008. SXM ultimately partnered with NBC's digital studio to produce the online series. After NBC shut the digital studio in 2011, all rights reverted to SXM, who are currently developing Season 2 with Yahoo and a private investor. As of early 2012, the episodes appear to have been removed from the NBC website, but can be found on Hulu.

Travis Glass is about to turn 30 and his life couldn't be worse. He lives with his mother. He's a door salesman. And the longtime love of his life is married to his brother. His descent into loserdom dates back to a fateful and humiliating week in high school, and all Travis wants is a second chance to get it right.

Be careful what you wish for …

Travis wakes up the next morning, 16 again, with a chance to relive all of life's firsts. While tinkering with the past, he manages to save a life, jeopardize a marriage, and lose the most precious thing in his otherwise flawed future. Before he knows it, Travis is transported back to adulthood, about to turn 30 again, and his life couldn't be worse …

Now, he'll have to keep hopping back and forth between high school and adulthood until he figures out how to put things right once and for all. But how do you put things right when every move you make can result in a new and totally unexpected future?

The series begins with Becca on the eve of her second wedding. It all seems perfect this time around, but she is still plagued by doubt. What if she could fix everything, and make the 'right' choices this time? Becca finds herself thinking about her former best friend Lolly, with whom she had a falling out many years ago. If only she could talk to her once again… Suddenly, after a freakish elevator ride, Becca gets the opportunity to do just that as she wakes up in New York City on the morning of her first wedding day in 1995. She's about to marry Sean, a bad-boy artist who is all wrong for her – and she knows her first move must be to reconnect with Lolly to re-live that day. Can she 'make it right' by living her life all over while re-adapting to life in New York City in the 90's – a time of smoking in bars, carrying pagers, having an AOL email address? Becca will soon discover there's no sure-fire way to make the right choices in life – even knowing everything she thinks she knows now.