After helplessly witnessing Earth's destruction from outer space, a crew of astronauts -- led by Cmdr. Chuck Taggart (Peter Weller) -- gets a chance to change history by traveling five years into the past. With a fragment of computer code as their only clue, they launch a search for the responsible party. But will they unravel the mystery before the tragedy reoccurs? Sebastian Roche, Christopher Gorham and Tamara Craig Thomas co-star. Also starring Angelica Lisk, Erin Davis, Daneen Boone, Leilene Onrade, Lizz Alexander, Katia Corriveau, Sarah Plommer, Natasha Radetic, Roberta Angelica, Tamara Craig Thomas