The Doctor looks back at Morgana. He doesn't approve of the weapon, he doesn't approve of her carrying it, but he can't deny the things she says are true. And he doesn't want either of them to die today.

"Fine, but weapons come out when we have no other choice, do you understand?" he says, firmly. "And I mean to make it that we have a choice."

He holds up the launcher, then nods to the door.

"Allons-y."