Doctor Who season 8, episode 12, “Death In Heaven,” marks the end of the season, and hopefully tonight’s episode will answer several of our burning questions.

Last week on ‘Doctor Who’

The Doctor and Clara finally faced the mystery of the season: Heaven. After Danny Pink unexpectedly dies in a car accident, Clara forces the Doctor to help find him. In their search they came across a place holding hundreds of bodies behind glass tanks, but to their dismay those bodies ended up being Cybermen.

Oh, and the Doctor also discovered that Missy is actually the Master.

This week, Missy wreaks havoc

With an army of Cybermen at her disposal and the world not wanting to listen to the Doctor, what will happen? Will he and Clara be able to save the day, not to mention Danny Pink? We have so many questions this episode, and we’re hoping at least some of them are answered!

The synopsis for the finale reads: “With Cybermen on the streets of London, old friends unite against old enemies, and the Doctor takes to the air in a startling new role. Can the mighty UNIT contain Missy? As the Doctor faces his greatest challenge, sacrifices must be made before the day is won.”

We certainly don’t hope the sacrifice has anything to do with Clara, but with reports that Jenna Coleman is leaving this Christmas (or earlier) we’re preparing for the worst.

Preview ‘Doctor Who’ season 8, episode 12

What are your ‘Doctor Who’ theories?

Do you think Clara will be leaving us tonight instead of this Christmas? Will Missy get away or will the Doctor manage to stop her once and for all? Leave your theories in the comments below!