Toby Jones as the Dream Lord
Imagine an adversarial companion! Because of some strange timey wimeyness, the Doctor and friends are forced to travel with Toby Jones as the Dream Lord, who clashes with the Doctor at every turn and makes life difficult for him along the way. The Dream Lord is essentially the Doctor’s equivalent of that voice in the back of our heads that says “Stop that! You’re stupid! Why do you look so weird?” Surely we could get some tips from the Doctor on how to shut that thing up?