ratings were less than those reached by Sci Fi's original series Battlestar Galactica, Stargate SG-1 and Stargate Atlantis, they reflect a 44% increase in ratings and a 56% increase in viewership over the same timeslot in the second quarter of 2005, as well as increases of 56% and 57% in two key demographics. 2006–08: Series 2-4 "The Christmas Invasion" aired on the Sci Fi Channel on 29 September 2006, along with the first episode of Series 2, New Earth. They were subsequently followed by the rest of season two, which completed airing on 22 December 2006. The second series did not fare quite as well in the ratings, averaging a 1.05 household Nielsen rating. The third season began airing on the Sci Fi Channel on 6 July 2007. The first two episodes of season three, "The Runaway Bride" and "Smith and Jones", earned 0.9 Nielsen ratings. Later episode "The Lazarus Experiment" earned a 0.8 rating, but the last two episodes and of the season, "The Sound of Drums" and "Last of the Time Lords" both earned 1.0 ratings. The third season averaged 1.3 million viewers. CBC Television aired the fourth series beginning on 19 September 2008 and repeated the first three series on its digital channel bold. CBC was not given an "in association with..." screen credit during the closing credits of season four episodes, unlike its credit during the first three series. On 12 December 2008, CBC aired the season 4 finale episode "Journey's End" in an extremely edited version that removed approximately 20 minutes of story in order to fit the episode into a standard 60-minute time slot with commercials. The Sci Fi Channel began airing season four on 18 April 2008. The season four premiere episode, "Voyage of the Damned", earned a 1.1 rating and captured 1.48 million viewers, making it the best-rated season premiere since the pilot and the episode with the most viewers since 2006. The season finale, broadcast in a special 90-minute time slot, earned a 1.0 rating and 1.26 million viewers. Season four as a whole was rated 25% higher than season three in household ratings, and 17% higher in number of viewers. The cable/satellite network BBC America began re-airing the entire 2005 series in the US on 21 November 2006. In December of the same year it was announced that US PBS station KTEH 54, which services San Jose, California, had acquired