Henrysix wrote:Spleen, great stuff so did I, would you mind explaining it to me, not a scooby what was going on!
Like Dan (John Bishop) said in the episode, it's a Groundhog Day style time loop.
It started the moment the Doctor threw the switch to start rebooting the TARDIS.
That's what attracted the Daleks, looking for revenge for the destruction of their fleet in the previous story.
Each iteration of the time loop was shorter by one minute as the Daleks learned from their mistakes.
(Incidentally, there was a nice wee nod and wink for the hardcore fans when the first Dalek said "I am not Nick!". The guy who voices the Daleks is called Nick Briggs.)
The second to last iteration was a feint by the Doctor and co to fool the Daleks into believing they were going to do one thing, when in fact they were going to do another - which led to the good guys escaping, all the explosives/fireworks going off, and destroying the building with all the Daleks still in it.
Simple enough for you?