Battlestar Galactica: Experiment in Terra

"Experiment in Terra" is the nineteenth episode of season one of the science fiction television series Battlestar Galactica. It is the twenty-second episode of the series overall, if one counts the pilot movie as three separate episodes. It was directed by Rod Holcomb with a script written by Glen A. Larson. It first aired on ABC on March 18th, 1979. Apollo is chosen by the Ship of Lights/Beings of Light to perform a mission to save the planet Terra (discussed in "Greetings from Earth") from the Terran faction, the Eastern Alliance.