>>168000400It's the best episode e'er, very exciting and interesting. Had the Doctor simply whisked the crew away, setting the base to explode, and let them live their lives elsewhere, presumed to have died on the base according to those on Earth - it is highly unlikely the crew would have understood or known what the Doctor was intending, it would have been a kidnapping. As the Doctor had it so firmly in his mind that the fixed point was both the explosion and the crew dying from this explosion (or on Mars, anyway), it is considered the case that the fixed point was not that the crew died on Mars according to people on Earth, but that the crew died on Mars, which begun a series o' fortunate events propelling humanity in advance. Hence, the crew dying on Mars was itself the fixed point, irrelevant of what was considered to be the case. The planet altering from "Mars" to "Earth" at the end signifies this difference. It is rather odd how one word changes, yet the article remains otherwise the same, that does not really seem to make sense, like in "Whatever Happened to Sarah Jane?" Anyway, it is the best story.
