"A Christmas Carol" was released on 21 November 2011 in Region 2, 22 November in Region 1, on 1 December 2011 in Region 4. A limited edition box set was also released in the UK with a lifted image of a Silent on the cover and including five 3-D art cards. Special features included in the box sets are commentaries on five episodes, "Space" and "Time", the prequels, trailers, "Monster Files", and the cut-down versions of the accompanying Doctor Who Confidential episodes. Also included is Night and the Doctor, which comprises five made-for-DVD mini-episodes. Reception Ratings "A Christmas Carol" received final ratings of 12.11 million UK viewers, the fourth highest rated Christmas special behind "Voyage of the Damned", "The Next Doctor", and Part Two of "The End of Time". The ratings for the series dramatically increased once time-shifted viewers were taken into account. "The Impossible Astronaut" premiered with a consolidated figure of 8.86 million viewers in the UK, and was reportedly the most recorded television event of all time. It also received 1.379 million requests on BBC's online iPlayer for the month of April. The series held a consistent viewership in the seven millions, with the lowest-rated episode being "The Almost People" with 6.72 million. The series also received a strong Appreciation Index, with all episodes aside from "A Christmas Carol" in the "excellent" category of a score of 85 or more. While "The Impossible Astronaut" and "A Good Man Goes to War" reached 88, the finale only scored 86, compared to 88, 89, and 91 of the previous finales of the revived series. In Canada on Space, "The Impossible Astronaut" was viewed by 538,000, the most-watched Doctor Who episode for the channel and its most-watched telecast thus far in 2011. On BBC America in the United States, "The Impossible Astronaut" was the channel's highest-rated telecast with 1.3 million viewers, increasing to 1.8 million when DVR recordings were taken into account. The second half of the series, with Top Gear and Luther, contributed to the third quarter of 2011 being BBC America's highest rated. Doctor Who also became the most-downloaded show of 2011 on iTunes in the US, with the sixth series specifically topping the chart. Critical reception The review aggregation website Rotten Tomatoes gives the series a score of 100 percent, with a weighted average of 9.04 out of 10. Reviewing the first half, Dave Golder of SFX praised