"Daybreak" is the three-part series finale of the reimagined science fiction television series Battlestar Galactica, and are the 74th and 75th episodes overall. The episodes aired on the U.S. Sci Fi Channel and SPACE in Canada respectively on March 13 and March 20, 2009. The second part is double-length. The episodes were written by Ronald D. Moore, and directed by Michael Rymer. The Season 4.5 DVD and Blu-ray releases for Region 1 feature an extended version of the finale, which not only combines both parts as a single episode, but also integrates it with new scenes not seen in the aired version of either part. The survivor count shown in the title sequence for Part 1 is 39,516. The survivor count shown in the title sequence for Part 2 is 39,406. At the end of Part 2, Admiral Adama announces the survivor population at approximately 38,000. The episodes portray the Galactica launching a rescue mission to retrieve Hera Agathon from the "colony", a heavily armed and defended Cylon base located near a black hole. They manage to rescue Hera, and in the end, the fleet finds a new planet to settle on, which they come to call Earth. The final episodes gave Battlestar Galactica the strongest ratings since its second season, though they received mixed reviews.