In which robots are discussed - again - and our heroes are nearly turned into one

The Doctor: Hi honey, I'm home!
River: And what time do you call this?
The Doctor: The death of time…
River: I just wanted to go to my job.
The Doctor: I was just being dramatic, don't worry.
River: What is you favorite song?
The Doctor: You don't even have a job, Doctor Song. And yes, you're my favorite.
River: You don't that's why it was funny.
The Doctor: And now we are talking about that... Who is you favorite Doctor?
River: I never mentioned anything about art to you.
The Doctor: Not art, you favorite Doctor, who is it?
River: My favourite Doctor is 11th, but I think all of them are amazing :).
The Doctor: You are sweet, River. Come, I have a surprise trip.
River: No, You are sweeter.
The Doctor: Oh, it is a good thing your parents are not here. Unless you count the Tardis.
River: I really start to hate when my brother is visiting us.
The Doctor: You don't have a brother, River. Or did I miss a lot?
River: P.S. My friend had a convo with you and he said you confessed to be a robot and I looked it up and it was true too!
The Doctor: So I am a robot and Amy and Rory had another kid? This is a strange day.
River: No, you are a robot and I am a human.
The Doctor: I am not a robot all the time. It was just once, to escape death.
River: I am a human! You are a robot. Know yourself is better than you wanted to know others.
The Doctor: I don't blame you, you know. We just should let it go.
River: I don't care about your IQ. This is stupid.
The Doctor: It is. I'm not, but this bickering is. So, go and have a look outside. It will improve your mood.
River: Fail.
The Doctor: What is it? What do you see?
River: Do you like to be used in future robots?
The Doctor: Not really. This is a bit of a failure indeed. My surprise was not for us to get made into cybermen.
River: Why does human need human like computer programs?
The Doctor: You ask them…
River: They won't talk to me.
The Doctor: Let's not try that. Let's pretend this never happened.