This episode originally aired on the tenth anniversary of Jon Pertwee's death. Pertwee played the Third Doctor on Doctor Who from 1970 to 1974 and later reprised his role in "The Five Doctors".

Date: February 1-2, 2007
Location: London, England, Parallel Earth

Mickey Smith: The Preachers know what they're doing. Ricky said he's London's most wanted.
Ricky Smith: Yeah, that's not exactly…
Mickey Smith: Not exactly what?
Ricky Smith: I'm London's most wanted… for parking tickets.

John Lumic: My everlasting children. Tell me, how does it feel?
Cybermen: We feel nothing.
John Lumic: But in your mind, what do you think?
Cybermen: We think the same. We are uniform.
John Lumic: But you think of what?
Cybermen: We think of the humans. We think of their difference and their pain. They suffer in the skin. They must be upgraded.

Mickey Smith: You’re just making this up as you go along!
The Doctor: Yep. But I do it brilliantly.

The Doctor: How did you get in to this, then? Rattling along with the Preachers?
Mrs. Moore: I used to be ordinary. Worked at Cybus Industries nine to five. Till one day I find something I'm not supposed to. A file on the mainframe. All I did was read it. Then suddenly I've got men with guns knocking in the middle of the night. A life on the run. Then I found the Preachers. They needed a techie so I just sat down and taught myself everything.

Cyberman: Why am I cold?
Mrs. Moore: Oh my God, it's alive! It can feel.
The Doctor: We broke the inhibitor. I'm sorry, I'm so sorry.
Cyberman: Why so cold?
The Doctor: Can you remember your name?
Cyberman: Sally. Sally Phelan.
Mrs. Moore: You're a woman.
Cyberman: Where's Gareth?
Mrs. Moore: Who's Gareth?
Cyberman: He can't see me. It's unlucky - the night before.
Mrs. Moore: You're getting married?
Cyberman: I'm cold. I'm so cold.
The Doctor: It's all right. You sleep now, Sally. Just go to sleep.

Cyber-Controller: This is the Age of Steel and I am its creator.

Cyber-Controller: I will bring peace to the world. Everlasting peace. And unity. And uniformity.
The Doctor: And imagination? What about that? The one thing that led you here. Imagination? You’re killing it dead.
Cyber-Controller: What is your name?
The Doctor: I’m the Doctor.
Cyber-Controller: A redundant title. Doctors need not exist. Cybermen never sicken.
The Doctor: But that’s it! That’s exactly the point! Oh, Lumic, you’re a clever man. I’d call you a genius, except I’m in the room. But everything you’ve invented you did to fight your sickness. And that’s brilliant. That is so human. But once you get rid of sickness and mortality, then what’s there to strive for? Eh? The Cybermen won’t advance. You’ll just stop. You’ll stay like this forever. A metal Earth with metal men and metal thoughts. Lacking the one thing that makes this planet so alive. People. Ordinary, stupid, brilliant people

Cyber-Controller: You are proud of your emotions?
The Doctor: Oh yes.
Cyber-Controller: Then tell me, Doctor, have you known grief and rage and pain?
The Doctor: Yes. Yes, I have.
Cyber-Controller: And they hurt?
The Doctor: Oh yes.
Cyber-Controller: I can set you free. Would you not want that? A life without pain?
The Doctor: You might as well kill me.
Cyber-Controller: Then I take that option.
The Doctor: It's not yours to take; you're a Cyber-Controller. You don't control me or anything with blood in it's heart!

The Doctor: Good luck. Mickey the idiot

Rose: You're alive!
(She throws her arms around Jackie)
Rose: Oh Mum, you're alive!
Jackie: Well, I was the last time I looked. What is it, what's happened, sweetheart? What's wrong? Where did you go?
The Doctor: Far away. That was... far away.
Jackie: Where's Mickey?
The Doctor: He's gone home.

Mickey Smith: I know it’s not easy with my face looking exactly like Ricky. But I’m a different man. I’m not replacing him. But we can remember him by fighting in his name. (Jake nods) With all those Cyber factories out there, do you think there’d be one in Paris?
Jake Simmonds: Yeah.
Mickey Smith: Then let’s go liberate Paris.
Jake Simmonds: What, you and me? In a van?
Mickey Smith: Nothing wrong with a van. I once saved the universe with a big yellow truck

Although the face of Big Ben in the parallel universe is square in "Rise of the Cybermen", it is round in this episode.

Mickey: Nothing wrong with a van. I once saved the universe with a big yellow truck.

This is a reference to the events of "The Parting of the Ways."