Sheba, Apollo, Cassiopeia and Starbuck retreat to an ancient navigation dome aboard the battlestar, where they intercept mysterious, fragmented transmissions (recognizable as those from the 1969 Apollo moon landings). As they attempt to enlist Boomer's electronics/communications knowledge with the transmissions, the fleet faces a Cylon basestar. Tired of running, Adama orders a military strike. Both Apollo and Starbuck volunteer to take Baltar's Cylon Raider to the basestar to infiltrate and cripple the ship's systems, to give the Galactica a better chance of victory. Baltar bargains for his freedom in return for tactical data. The Galactica (and Apollo/Starbuck's mission) is successful; the Cylon base ship is destroyed and the fleet departs their galaxy, in search of Earth.
Series stars; Richard Hatch as Apollo, Dirk Benedict as Starbuck, Herb Jefferson Jr. as Boomer, Lorne Greene as Adama, Terry Carter as Colonel Tigh, Maren Jensen as Athena, Tony Swartz as Jolly, Laurette Spang as Cassiopia, Noah Hathaway as Boxey, Sarah Rush as Rigel, David Greenan as Omega, Anne Lockhart as Sheba, Jack Stauffer as Bojay, Larry Manetti as Giles, Ed Begley, Jr. as Greenbean, and John Colicos as Baltar.
(Thanks to Michael Faries
Battlestar Galactica.com)