Theory:SJA television discontinuity and plot holes/Whatever Happened to Sarah Jane?


 * Sarah Jane lives on 13 Bannerman Road but a sign at the gates says '21'.
 * Maybe with Sarah Jane gone, more people moved in on Bannerman Road and her house is now 21 Bannerman Road instead of 13 Bannerman Road.
 * Its actually because the house they film is 21 Clinton Road, Penarth, Cardiff. So that explains why the house sometimes has a 21 instead of 13


 * Sarah Jane explicitly denies that the Earth created by her absence is a parallel world. However, in light of DW: Turn Left, it is considerably unclear what this means. If it's not a parallel world, then what is it?
 * Sarah Jane states in the story that this is the same world, changed.


 * When Maria arrives in July 1964 on the day of the accident, a radio can be heard playing You Really Got Me by The Kinks. However the song wasn't released until August 1964.
 * The song was playing on the radio, however, so perhaps it was being promoted in advance of its release.


 * Alan is the only character to refer to the Trickster by that name, even though he is never told it. It's possible he might have made the name up, except that the Tenth Doctor refers to the villain by this same name in DW: Turn Left.
 * Alan does interrogate the Graske, with ample time for him to tell Alan the Trickster's name/title. Also, Alan may simply have called him the right thing based on his actions.


 * Why wasn't the Torchwood Institute superweapon, utilized to destroy the Sycorax mothership in DW: The Christmas Invasion utilized against the meteor?
 * The Trickster may have prevented its creation, or it may have been dismantled/destroyed as a result of the destruction of Torchwood 1 in DW: Doomsday. Presuming it would do the trick.


 * A meteor would fall through the atmosphere in seconds, not make the leisurely descent portrayed here.
 * Dramatic effect.


 * Andrea says she's been dead for 40 years, and she, presumably like Sarah Jane was born in 1951 as they're the same age, and as this story is set in 2008 that would make her 57, not 53
 * The use of the phrase "40 years" is obviously a rounded approximation by Andrea.


 * If the Trickster could remove Maria from time just by having the Graske take her to Limbo, why did he have to make a deal with Andrea? Or why didn't he just send the Graske back in time to kill Sarah Jane directly?
 * The trickster needs Andrea's permission before he can remove Maria from time. However, he also needs the Graske as Maria is protected from his direct actions.

Because maybe he wanted Bear-A-Jane more importantly, or maybe maria could easily be 'done', also andrea also decided to take her away, and also the world changes a lot more when removing sja.