It's just two days away and believe us when we say you are not prepared for Doctor Who 's series 9 finale, 'Hell Bent'.

A lot happens in this hour-long epic - a lot - and by the time the credits roll, the Doctor's life has been changed forever.

No spoilers - but here's ten hints at what to expect from the last in the current series.

1. This is an episode steeped in Doctor Who history - regeneration, the Time War and relics from the past all play a part.

2. "Nothing's sad till it's over - then everything is."

3. Murray Gold's superb 'The Doctor's Theme ' - also known as 'Bad Wolf Theme' - is back for the first time in years.

4. "Words are his weapons."

5. One moment echoes 1997 Harrison Ford action flick Air Force One. Seriously.

6. "You like a cliffhanger, don't you?"

7. The Doctor describes something as "well hard".

8. "How many regenerations did we grant you?"

9. Something that's happened before happens again - but in reverse.

10. "He was a good man once."

Doctor Who's current series concludes this Saturday (November 28) at 8pm on BBC One.

Watch the epic trailer for 'Hell Bent' below:

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