Hilarious sketch. "I'm not Doctor Who. I'm your English teacher!" "I don't think you are though. I think you're a 945 year old timelord. Did you just pitch up from Mars?...You know your house, right? Your house? Is it bigger on the inside?...Did you park the TARDIS on a meter?...Do you fancy Billie Piper, sir?"
Have I mentioned that I love Whovians. If you don't understand the reference, that's the Doctor and Clara from who. The thing they quoted is a parody of "David Tennant On The Catherine Tate Show" that they did for comic relief!