Galactica 1980 S01 E03 Galactica Discovers Earth (3)

"The great ship Galactica, our home for these many years we've endured the wilderness of space. And now, we near the end of our journey: we have, at last, found Earth."

Xavier appears on Earth before the arrival of the Galactica and it is up to Tory and Dillon to stop his schemes before all hope for a future colony is lost.