Mr Awe wrote:
The filming schedule was designed to produce a 60 minute story so they're stretching the footage to get to 75 minutes.
Maybe there will be a 15-minute flashback montage of key moments from the series' history...
Sorry, but I'd rather they didn't over-indulge in flashbacks via archive footage again; we only just had that in The Name of the Doctor
. A much better idea would be to let some of the surviving old cast do something new with the current cast.