The Master's relationship with the Doctor is a complex one... One that you as the Doctor's current companion are now stuck in the middle of.

"Mum, where in heavens name are we!?" You say frantically as you look for the Doctor, but the voice you hear from your walky-talky in response isn't hers and you feel fear for the first time since you joined her to travel across the stars.

"My dear, your mum won't be saving you," A man's voice with a strong Manchester accent says with a sinister laugh.