The phone the Doctor uses in this episode is a Nokia 7500 prism
The Doctor previously used a Rhondium sensor in the Third Doctor serial The Time Warrior.
When Malcolm tells the Doctor that he has read all his UNIT files, and The Doctor replies "What was your favorite? The giant robot?", it is in reference to the original Doctor Who series serial Robot.
As the bus is being chased by the police at the beginning of the episode, McMillan reports the bus's registration number as being W974 GHM. However, as the Doctor lands the bus at the end of the episode, the registration is clearly RUA 461W. Although both 'W' registrations, the prefix and suffix systems would alter the age of the bus by around 20 years.
According to Russell T. Davies, this is the 200th story of the series.
This marks the first time an episode of the series has been shown in High Definition.
The Doctor: Right...Fine...But um, before I die of old age (which in my case would be quite an achievement so congratulations on that.) Is there anyone else I can talk to?
The Doctor: Right... fine... but um, Before I die of old age (which in my case would be quite an achievement, so congratulations on that), is there anyone else I can talk to?
Police Officer: Open the door or I'll add resisting arrest!
The Doctor: I'd step back if I were you.
Police Officer: I'm charging you too! With aiding and abetting.
The Doctor: Yes. I'll just step inside this police box (points to the TARDIS) and arrest myself.
The Doctor: Far away. Chops and gravy. Watching TV. Mike and Suzanne, and poor old Tina.
The Doctor: Just think of them. 'Cause that planet out there, all three suns and wormholes and alien sand, that planet is nothing. You hear me? Nothing, compared to all those things waiting for you. Food and home and people. Hold on to that. 'Cause we're gonna get there, I promise. I'm gonna get you home.
Magambo: It's the Doctor.
Malcolm: Do you mean "The Doctor" Doctor?
Magambo: I know, we all want to meet him one day, but we all know what that day will bring.
The Doctor: I'm the Doctor, by the way, and this is Christina, the honourable Lady Christina, at least I hope she's honourable.
Christina: Those things are going to turn the entire Earth into a desert. So why exactly are you smiling?
The Doctor: Worse it gets, the more I love it!
Christina: Me, too.
The Doctor: The spaceship's a write-off. but the 200's small enough.
Christina: How does a crystal drive a bus?
The Doctor: In a super-clever, outer-spacey way. Just trust me.
Malcolm: I'm measuring an oscillation of 15 Malcolms per second.
The Doctor: 15 what?
Malcolm: 15 Malcolms. It's my own little term. A wavelength parcel of 10 kilohertz operating in four dimensions equals one Malcolm.
The Doctor: You named a unit of measurement after yourself?
Malcolm: Well, it didn't do Mr. Watt any harm.
The Doctor: Anyway, come on. Allons-y!
Christina: Oui, mais pas si nous allons vers un cauchemar. (Yes, but not if we go towards a nightmare.)
The Doctor: Ho, ho! We were made for each other.
Christina: The aristocracy survives for a reason: we're ready for anything.
The Doctor: (regarding the Tritovores' ship) Oh, this is beautiful! Intact, it must have been magnificent! A proper, streamlined, deep-spacer!
Christina: Oh, I'll remember that as I'm being slowly tortured. At least I'm bleeding on the floor of a well-designed spaceship.
The Doctor: (using his Rhondium Sensor) Oh, we've got excitation! And I'm definetely picking up something very strange.
Lady Christina: Yeah, I know the feeling.
The Doctor: (first meeting Christina) Hello, I'm the Doctor. Happy Easter.
Christina: But you were right, it's not about the money. I only steal things for the adventure and today with you; I want more days like this. I want everyday to be like this. We're made for each other, you said so yourself. The perfect team. Why not?
The Doctor: People have travelled with me and I've lost them. Lost them all. Never again.
Christina (as she's driving off in the flying bus): We could have been so good together.
The Doctor (smiling): Christina, we were.
Christina: And what's your name?
The Doctor: I'm the Doctor.
Christina: Name, not rank.
The Doctor: The Doctor.
The Doctor: The Doctor.
Christina: You're called the Doctor?
The Doctor: Yes I am.
Christina: That's not a name, that's a psychological condition.
Carmen: Doctor, you take care now.
The Doctor: You too. Chops and gravy, lovely.
Carmen: No, but you be careful, because your song is ending, sir.
The Doctor: What do you mean?
Carmen: It is returning. It is returning through the dark. And then, Doctor... oh, but then... he will knock four times.
Christina: That Lordship of yours ... the lord of where, exactly?
The Doctor: Of Time. I come from a race of people called Time Lords.
Christina: You're an alien?
The Doctor: Yeah but you don't have to kiss me either.
Christina: You look human.
The Doctor: You look Time Lord.
This is the second appearance of Noma Dumezweni as Captain Magambo. Her previous appearance was in Donna Noble's parallel world in the Season 4 episode "Turn Left", where she and UNIT were helping Rose use the TARDIS to send Donna back in time.
In The Mighty 200 poll conducted by Doctor Who Magazine, this is the readers' 99th favourite story.
Turkey: May 15, 2011 on CNBC-e
Malcolm: No, that's Quatermass.
Malcolm's invented unit of measurement the 'Bernard' is named for Bernard Quatermass, a seminal British science fiction character who was featured in popular and critically acclaimed television serials starting in the 1950's. The Quatermass stories were adventures that dealt with threats from space and ran sporadically until 1979. A brilliant and highly moral astrophysicist who has been played by many different actors over the decades, Quatermass is often cited as an influence and precursor to character of the Doctor.