Missy finds a way into Gallifrey, pulling herself and the Doctor into dangerous territory.

Set before "A Good Man Goes to War". The Doctor gathers his debtors with the stature of a visionary in front of expendables, but when it comes time to collect his favors from a woman in which he owes his entire life to, he cannot help but stand on her doorstep and nervously rehearse his plea for help. His weapon, his Martha Jones.

The TARDIS telepathic circuits are malfunctioning, leaving Clara and the Doctor's memories at the disposal of a certain Dreamlord.

Spoilers for 'Dark Water'. All the graves on planet earth are about to give birth. Missy makes sure the Doctor bears witness to the event.

An alternative take of "Flatline" where Clara is incapable of filling the Doctor's shoes. "That's how you think, isn't it?" Clara replied defensively. The two of them survived, Clara and the Doctor. Bristol remained largely unscathed and the world still stood beneath their feet. How could she afford to think any differently?