|As user daveac has noticed in his television listings for Saturday, 30 June 2007, episode 13 is indeed slightly longer than usual. This squares with hints Julie Gardner gave in a March podcast for The Stage, and indeed Russell T. Davies' flat statement in Doctor Who Magazine #384.
However, a mystery still seems to lie in the difference of the allotted times for the initial broadcast on Saturday, wherein 50 minutes are given on BBC1, and the repeat broadcasts on BBC3, where "Last of the Time Lords" is afforded 55 minutes.
Freema Ageyman's main fansite is quoting a run-time of 51.5 minutes.
Does this wide range of "time slots" mean anything about the version one might see on a given evening? Are there multiple copies? Why allow 55 minutes if the episode is only about 52? What will this mean for the episode's upcoming broadcast on the American SciFi Channel? As of today, these are all unanswered questions, sure to force dedicated Doctor Who fans to tape each broadcast and check for possible differences.