Originally Posted by Soupietwist:
“I agree with the original poster. And people claiming their have been arcs in Doctor Who since it's return are mostly wrong, all they are is loose reacuring themes that then suddenly are revealed in the finale. I mean how many people truely noticed 'Bad Wolf' untl it was revealed? Or a vague torchwood theme of series 2. Same with series 3 and the Master references and series 5 with a crack showing up at the end of episodes. Series 6 is the only one that had anything close to being an arc.”
There appears to be differences in what people interpret as an 'arc' - certainly your version is more specific than mine, and mine is more specific than some.
Arcs, as I know of them, aren't just foreshadowing of a finale, nor are they something as vague as a phrase repeated like a catchphrase.
Mickey's transition from being discarded by Rose and mocked by the Doctor to being a valued freedom fighter having moved on from her, is an arc - a change in the character over a series of episodes. Similarly, Amy's transition from wanting to run away from her wedding to realising what Rory means to her, and also Rory managing to pull himself out of the shadow of the Doctor.
The crack in time caused by the TARDIS explosion is most definitely a arc, one in the plot. It's the basis for the Doctor's meeting with Amy, the way they defeat the Weeping Angels, the reason that Amy loses Rory, as well as being the focus of the finale. It's one story thread, spread out over the whole series.