time travler have to go back to 1969 to save earth

An English teacher travels back in time to prevent the Kennedy assassination, but discovers he is attached to the life he has made in a bygone era.

To save Earth from the mistakes of mankind, ancient timelines converge.

Timetraveller Jack Slade enters the year 2035, where society has been destroyed by an evil regime. He travels back in time to 1998 to try and save the planet from annihilation.

Edited entirely from the TV show. A teenager from the year 3000 takes part in a time-travel experiment, but due to a malfunction finds herself sent back to the year 1990, along with a criminal from the year 2500. She must convince people of this time period that she is not crazy and that the criminal from the future must be stopped before he tries to take over everything.

A spaceship travels back in time to the age of dinosaurs.

This ain't Doctor Who! In the year 2120 a clairvoyant scientist, gleefully played by Teri Weigel, teams up with Rich Handsome to discover the secrets of time travel. Our heroine has an insatiable curiosity about the history of sex, and by caressing historical artifacts, she is transported through time and space, throughout the eons, to experience the carnal pleasures of eras long gone.

In the year 2110 a small group of space travelers have left the war-ravaged Earth behind. After transporting themselves through space and time, they approach what they think is Earth....or is it? Soon they will find out a truth they are not ready to confront, a truth that will bond them to change the fate of humanity, a truth that will turn them into "Time Refugees."

At the 26th century, Earths core exploded in a mysterious way, humanity was forced to evacuate earth. 65 years later, one of the last survivors spent money on operation return to earth, which has discovered earth is back in shape but in difference by look, other planets gathered around it to give earth air. 2565 is the year we will return to earth. Three pilots from the new Terran confederation space force unit has signed up for the mission to investigate earth. One of the pilots name Li Shuai, on board TCS Macau, discovers a jump point that of some sort of space tunnel that leads directly to earths core. After a brutal attack on the pilots, Li Shuai managed to escape through the tunnel and crash land on an unknown planet, with no idea where he is, at the same time a convoy of 200 passengers waiting for a signal to land on earth. But unknowingly there might be a traitor among them.