The BBC has released the official synopsis for the penultimate episode of Series 8.

Dark Water, which will form the first part of the “emotional” series finale, has been written by Steven Moffat and directed by Rachel Talalay. It airs on BBC One on Saturday 1st November, with the time still to be confirmed.

In the mysterious world of the Nethersphere, plans have been drawn up.

Missy is about to come face to face with the Doctor, and an impossible choice is looming.

“Death is not an end” promises the sinister organisation known only as 3W – but, as the Doctor and Clara discover, you might wish it was.

“Are you my mummy?” Let’s hope not! Click here to rate this weekend’s episode.