Originally Posted by sn_22:
“I doubt it - in fact, I'd suggest its quite the opposite. If they're prepared to write-off 800k just in order to get the start right, they must have high hopes for it's future.”
I suspect you will find that the reality is a little more complicated than this ...
Despite the BBC's press statement a couple of months ago, it is
highly unusual for them to film a drama pilot and then not broadcast it. The BBC has done it only once in the last ten or so years - unlike ITV, which has entire series sat on shelves gathering dust because they're deemed too bad to broadcast.
The rationale behind the move to reshoot the pilot then add two more 90-minute episodes is, I would guess, more closely linked to the BBC's reliance upon Steven Moffat than on any faith they might or might not have in this project. Binning Sherlock completely would run the risk of alienating a writer they need on one of their biggest franchises - a writer who can get work in Hollywood - so it's a better bet to keep him sweet.
Choosing then to broadcast this high profile new series during July/August is a bit of a slap in the face: that's the time you use to bury projects you're not entirely happy with, in the hope most people will be on holiday. And given that this
was good - and, indeed, miles better than anything ITV has served up recently - that decision can only be branded baffling.

Unless it was a deliberate move to try and grow a new returning series away from the fiercer competition of the autumn/winter schedules?
I'd agree with many of the enthusiastic comments on here, and also with posters making (valid) comparisons with Doctor Who. The only thing I'd add is that the plotting was significantly better than some of Moffat's and indeed all of Gatiss' work on the last series of DW.
I await the overnight viewing figures with interest ...