So, you may be aware that the Doctor is not necessarily the most tactful man in the universe. That he's prone to be snippy, dismissive and to generally fail to apply any kind of social filter between his brain and his mouth.
I suppose that's what his companions are for – to add that human touch to proceedings. And Clara has really taken that to heart, as we discovered in episode three, Under the Lake.
You see, she has prompt cards. Yep, when the Doctor starts to blurt out something thoughtless like "Wow, this is amazing!" because someone just died and apparently turned into a ghost, Clara pulls him aside and gets out the cards.
“I'm very sorry for your loss. I’ll do all I can to solve the death of your friend/family member/pet,” he said in this case. He wasn't supposed to say all the options.
But what were the messages on the rest of the cards we briefly glimpsed? And how do they translate to Time Lord?
"I completely understand why it was difficult not to get captured." No you don't.
"I didn't mean to imply that I don't care." And I didn't not mean to.
"It was my fault, I should have know you didn't live in Aberdeen." Sorry Sarah Jane, for confusing it with South Croydon.
"No one is going to be eaten / vapourised / exterminated / upgraded / possessed / mortally wounded / turned to jelly. We'll all get out of this unharmed." Works for Daleks, Cybermen, Satan, everything really... But some of you probably will still die.