The world descends into chaos as the final sanction begins, Gwen must stand alone and fight on her hands when the Government puts into action its plans to remove the underachieving ten percent of British children.
There is only one way for Jack to save the children of Earth - making the ultimate sacrifice...
On DVD and Blu-ray, there are differences in music compared to the broadcast version. Last-minute changes were made before broadcast, but the episode had already been released to manufacture, leaving it too late to change and still meet the street date. Some scenes have music that went without for broadcast and the climactic dramatic scenes have female vocalizations in the broadcast version while the disc version maintains the episode's intense rhythmic track.
The Welsh line, "Croeso i Gymru" spoken at one point by PC Andy, means "Welcome to Wales" in English.
Gwen: (On video) There's one thing I always meant to ask Jack. Back in the old days. I wanted to know about about that Doctor of his. The man who appears out of nowhere and saves the world. Except sometimes he doesn't. All those times in history when there was no sign of him. I wanted to know why not. But I don't need to ask anymore. I know the answer now. Sometimes the Doctor must look at this planet and turn away in shame. I'm recording this in case anyone ever finds it, so you can see. You can see how the world ended.
Colonel Oduya: Mr Dekker, I take it. You managed to survive.
Mr Dekker: I just stood back, sir. A strategy that's worked all my life.
Rhys: Hey, she's pregnant.
Gwen: Oh, thank you. Who's she when she's at home?
PC Andy: Bloody hellfire. Who's the father?
Rhys: Oh, I'm slapping you, yeah.
PC Andy: You know Ianto?
PC Andy: Was he gay?
Gwen: Shut up.
PC Andy: They might not know.
Gwen: Well, in which case, do not say.
PC Andy: Well, that proves my point.
Gwen: Couldn't have just chosen a pub, could you?
Rhys: It's bloody freezing. My feet.
Jack: Oh, I miss that, the Welsh complaining. You look good.
Gwen: I look huge.
Rhys: She's bloody gorgeous.
Gwen: They died. And I am sorry, Jack, but you cannot just run away. You cannot run away.
Jack: Oh, yes I can. Just watch me.
Charles Abomeli appears as Colonel Oduya but isn't credited.
International Air Dates:
United States: July 24, 2009
Germany: October 14, 2009 on RTL II
Sweden: February 25, 2010 on TV4
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