Nineteen (1987)

An unemployed man learns that his ex-girlfriend was murdered. He suddenly finds himself travelling through time to his middle school years and has chance to change the future and save the girl. He aims to rise to the top of the most brutal delinquent gang.

In 2004, an officer for a security agency that regulates time travel must fend for his life against a shady politician who has a tie to his past.

Tom Merrick gets caught up in a time-traveling conspiracy and must set the timeline right before it is irrevocably altered.

What would have happened if the Shiroyasha never existed? Edo is thrown to chaos by a mysterious cause. Sakata Gintoki, now lives in a world where the future has changed, without him. What has happened to the Yorozuya? Gintoki, who is now a ghost of the past, must once again carry the burden in order to save his friends. He must finish the biggest job ever, which may be the final job of Yorozuya.

When a tech blogger lands an interview with a tech guru and stops an attack on him, he finds a mysterious ring that takes him back 57 seconds into the past.

Agents J and K are back...in time. J has seen some inexplicable things in his 15 years with the Men in Black, but nothing, not even aliens, perplexes him as much as his wry, reticent partner. But when K's life and the fate of the planet are put at stake, Agent J will have to travel back in time to put things right. J discovers that there are secrets to the universe that K never told him - secrets that will reveal themselves as he teams up with the young Agent K to save his partner, the agency, and the future of humankind.

Martin was a normal teenage boy before the country collapsed in an empty pit of economic and political disaster. A vampire epidemic has swept across what is left of the nation's abandoned towns and cities, and it's up to Mister, a death dealing, rogue vampire hunter, to get Martin safely north to Canada, the continent's New Eden.

Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.

A special-ops team is dispatched to fight supernatural beings that have taken over a European city.

Two siblings begin to develop special talents after they find a mysterious box of toys, and soon their parents and even their teacher are drawn into a strange new world – and find a task ahead of them that is far more important than any of them could imagine.