10 Doctor Who Episodes With Disturbing Implications
5. The Master Hit His Wife (Last Of The Time Lords)
Missy's redemption aside, the Master is a nasty piece of work, gleefully committing widespread death and destruction with barely a shred of remorse.
But Series 3's Last Of The Time Lords did something that managed to make the character even darker: it turned him into an abuser.
The Master's wife, Lucy Saxon, doesn't have a whole lot to do in this episode, but we see several shots of her where she has bruises around her right eye, and she appears much more uncomfortable around the Master than she did in the previous episode.
It's never explicitly stated or shown, but the implication here is that the Master has been regularly beating her, which has made her afraid of him.
It's really heavy stuff for a family show (which is why it's only implied), and the Master's treatment of Lucy ends up getting him killed when she decides to shoot him at the end of the episode. Can't really argue with her on that one.