Howling:Sarah Jane's gang and the Tenth Doctor

It's shown in SJA "Death of the Doctor" that Sarah Jane, Luke, Clyde and Rani all still remember meeting the Tenth Doctor in "The Wedding of Sarah Jane Smith." But that story took place in a version of history that's now been negated by the effects of the Time Crack from Series 5 of DW (In that timeline, aliens were fairly common knowledge, but now those invasions have been totally erased from existence). So how can they remember things that never happened? EJA 15:53, May 11, 2011 (UTC)

Aliens, even prior to the ones erased were "fairly common knowledge" for decades, but also plausibly denied. The Trickster meddling with one man's is not the same as the Daleks stealing 27 planets or Cybermen being in every home. If the invasions were negated, it's almost certainly only the big ones that altered the status quo (and that didn't occur until series 3 in Doctor Who) 90.208.84.168 17:50, May 11, 2011 (UTC)

And "The Wedding of Sarah Jane Smith" was well after Series 3 of Dr Who. Actually, aliens started to become a lot more noticeable and impossible to deny after the beginning of Series 2, with "The Christmas Invasion."

Only some events were erased when the universe was destroyed and rebooted. Which ones seems to depend, in some way that hasn't been made too clear, on Amy's memory. (Out of Whoniverse: Steven Moffatt has given himself the chance to pick and choose which events he wants to retain.) The probable explanation of Sarah Jane and the others remembering the events of The Wedding of Sarah Jane Smith is that those events were included in the reboot, whereas the various widely known alien incursions were excluded. 89.241.66.26 14:58, May 27, 2011 (UTC)

I love the fact that everybody always remembers the Sycorax but not the Slitheen ship crashing into Big Ben and landing in the Thames. Big Ben is even still covered in scaffolding when everybody's on the roofs in Christmas Invasion.

At what point in series 5 did anyone say everything had been erased? Nowhere. All we got was that the CyberKing invasion in 1851 and the Dalek invasion of 2009 were erased, with time travellers still remembering them if they witness them. At no point was is said that every single Russell T Davies-related thing had been cracked, like you're suggesting. Just two invasions, only one in the present day. People didn't start expecting alien life until the Dalek invasion. Therefore, you only need to get rid of that. Simple, really. Enough with the "different timelines" stuff, too. The Pandorica restored the universe to exactly how it was prior to the events of The Big Bang, which was a world where an invasion in 1851 and an invasion in 2009 never happened. It had a few cracks, too, hence post-Big Bang River in Flesh and Stone where she recognises (based on her facial reaction to seeing it) the crack. 90.199.247.156 03:09, May 29, 2011 (UTC)