[V.O. intro from every episode except pilot]

Chuck Taggart: We saw the Earth destroyed, and in a heartbeat everything and everyone we knew was gone. There were five of us, the crew of the space shuttle Odyssey, and we were the only survivors. A mysterious being who called himself The Seeker rescued us and sent us back in time. And now we have five years to live over, five years to discover who or what destroyed the Earth, five years to stop it from happening again.