Howling:Big bad
From Tardis Wiki, the free Doctor Who reference
The Howling → Big bad
all right it has been confirmed that the big bad apeared in TEH but not in the most conventonal (sp) form so here is the possibiltieas i think
1 Rory it could be
2 The shadow in little ameilas house in 1996
3Prisoner zero (dought it)
4 (this is a strech ) Red telephone box
please please add your ideas !
5. The Crack iteslf - perhaps it is a sentinent monster consuming all of spacetime.
6 The Doctor (it really is his fault)
7 Amy
8 Amelia
9 The house of horror.