Well done ITV, and well done all involved for finally giving us a drama, that ends on a fantastic episode, it's becoming unbearable with many TV dramas, the repeated pattern of a brilliant penultimate episode, then a dud of a finale. This breaks that recent mould.
The solution went right down to the wire. Snippets began to unravel, before the shock conclusion (although I think he/she/they has become a bit of an 'I'm the bad guy' actor/actress. Needless to say the solution was well delivered.
The impact of the story on the characters involved is what impressed me the most, the stark horror facing Rob and Alice when David took the kids away was harrowing, so well played out.
Lee Ingleby, Hermione Norris, Daniel Ryan, Adrian Rawlins all did a great job. Best of all, no four week wait.
Impressive drama. 9/10