Battlestar Galactica S01 E19 Experiment in Terra

"The Last Battlestar Galactica Leads a Rag Tag Fugitive Fleet on a Lonely Quest for a Shining Planet Known as...Earth."

Apollo and Starbuck follow the escaped Eastern Alliance ship back to Terra, where they help the Terrans overcome a nuclear holocaust, with the help of the race of white lights that had earlier helped them defeat Count Iblis.