The amnesia pill is called "Retcon". This term is also short for "retroactive continuity", which is the practice of deliberately changing previously established facts in a work of serial fiction.
Suzie is one of three characters of Torchwood to have died and then been brought back, Jack and Owen being the other two.
The ISBN quoted in the show does not match the book shown on screen. ISBN 0-19-860-0585 refers to the "Oxford Dictionary of Quotations". The edition of the Complete Poems of Emily Dickinson shown has the ISBN 0-571-108-644.
Time discrepancy: When Toshiko identifies their destination as Hedley Point, it's pitch-black outside. Moments later, Owen says they have "minutes", and it's a little light out, but the sun is still well below the horizon. When they arrive at the docks, it's bright day out, and judging from Gwen and Suzie's shadows, it's several hours after sunrise.
After Jack pulls the glove out of storage, just after he says "...it lay at the bottom of the bay till we dredged it up," there is a bug or piece of dirt on the camera lens. You can spot it easily near the top of Jack's shirt as he moves.
The song used in the final scene is "Gorecki" by Lamb.
The song on the radio when Gwen and Suzie are in the car is "Soleil, Soleil" by Nana Mouskouri.
The song playing in the Wolf Club when Jack, Owen and Gwen are looking for Luci is "Red Is The New Black" by Funeral for a Friend.
When Gwen first attempts to use the Resurrection Gauntlet on Suzie, there are flashbacks to "Everything Changes" (where Suzie shoots Jack and then kills herself).
Suzie: It's my fault, isn't it? It never bloody stops being my fault. Can't you just let me die?
Jack: You don't get off that easy.
Detective Swanson: Are you always this dressy, for a murder investigation?
Captain Jack: What, would you rather me naked?
Detective Swanson: God help me; the stories are true.
Owen: You got your stopwatch?
Tosh: When Suzie left Torchwood, she was on the run. She wiped her records, I couldn't retrieve the files. Suzie was good at computers. Suzie was good at everything.
Owen: She was good at murder, too. It was a laugh a minute with Suzie.
Jack: That one's for Ianto. Risen Mitten, Life Knife, and that old classic, Stun Gun.
(After Gwen has used the glove for the first time)
Ianto: Amazing. She's a natural. 24 seconds.
Owen: Give Ianto a stopwatch and he's happy.
Ianto: It's the button on the top. (Grins)
(As Jack pulls out the glove)
Owen: You know, we never gave it a cool name.
Toshiko: I thought we called it the "resurrection gauntlet"?
Owen: Cool name.
Ianto: What about "the risen mitten"?
(Everyone looks at him)
Ianto: I thought it was catchy.
Gwen: Have I got this right? When I die, you get to keep all of my possessions? My whole life's gonna get stashed in a locker?
Jack: Rules and regulations.
Gwen: What if I leave all my stuff to Rhys?
Jack: We'll stash him away too.
Captain Jack: The resurrection days are over, thank God.
Ianto: Oh, I wouldn't be too sure. That's the thing about gloves, sir. They come in pairs.
Ianto: (As he deals with Suzie's body) What do you want me to say on the death certificate?
Captain Jack: Good question.
Ianto: She had quite a few deaths in the end.
Captain Jack: I don't know. "Death by Torchwood".
Suzie: (To Jack) Captain, my Captain. Do you want to know a secret? There's something moving in the dark and it's coming, Jack Harkness, it's coming for you.
Captain Jack: If she's dead, then I'm going to kill you, Suzie Costello. I promise. I'm going to kill you for the last and final time.
Suzie: But would you, when there's a part of her that's now me? Could you really do that, if I'm the only thing left of her?
Captain Jack: Why are you doing this?
Suzie: Because life is all, Jack. You should know! I'd do anything to stay. Anything.
Gwen: When you're dead, I mean, when you die, what happens?
Suzie: What do you want me to say?
Gwen: The truth.
Gwen: Tell me.
Suzie: Are you religious or…?
Gwen: Just sort of in passing, you know?
Suzie: Do you believe in Heaven?
Gwen: I don't know.
Suzie: Yes, you do. What do you believe?
Gwen: It's stupid, but I always sort of think, like, you know, white light and all that. And I think of my gran, like she'd be there, waiting for me. The smell of carbolic.
Suzie: Your faith never left primary school.
Gwen: So what's up then?
Suzie: Nothing. Just nothing.
Gwen: (After some hesitation) But if there's nothing, what's the point of it all?
Suzie: This is. Driving through the dark. All this stupid, tiny stuff. We're just animals howling in the night, 'cause it's better than silence. I used to think about Torchwood. All those aliens coming to Earth? What the hell for? But it's just instinct. They come here 'cause there's life, that's all. Moths around a flame, creatures clinging together in the cold.
Gwen: So when you die, it's just...
Gwen: And you're all alone? There's no one else?
Suzie: I didn't say that.
Gwen: What do you mean?
Suzie: Why do you think I'm so desperate to come back? There's something out there in the dark. And it's moving.
Suzie: That night, my last night on Earth - so I thought - before I shot myself, I shot Jack right through the head. I killed him, stone dead. And then he just stood up and lived. Am I right? Did that happen? Gwen?
Gwen: Yes, it did.
Suzie: So he can survive a bullet through the head?
Gwen: I don't know. He won't explain it properly. He said something happened to him a while back. He said, he said he can't die. Not ever.
Suzie: And he makes judgements about whether I'm allowed to live. It's all very easy for Captain Jack, isn't it?
(Gwen storms into Captain Jack's office)
Captain Jack: I had a boyfriend who used to walk into rooms like that. The grand entrance. Got kind of boring. Though he was one of twins, so I put up with it. Twin acrobats. Man, I gotta write that book. Maybe even illustrate it. I can talk for a long time, a very long time…
Gwen: Takes me a while to piece things together.
Captain Jack: Meaning?
Gwen: Suzie had the glove. You put her in charge of it. But tell me, Jack, did you ever ask about her father?
Captain Jack: How do you mean?
Gwen: He's got cancer. He's been dying slowly now, for years. And what do you do? You give his daughter the one device that brings people back to life. Is it any wonder she got obsessed?
Captain Jack: Oh, so this is all my fault?
Gwen: Well, isn't it? Did you ever stop and think? Did you ever look at Suzie? Did you ever think what that glove would do to her? Did you?
Suzie: So tell me, since I've been gone, you enjoying it?
Gwen: Yeah. Well, you know this place, it's sort of… it's mad, isn't it?
Gwen: Bloody nuts.
Suzie: Best job I ever had.
Gwen: Me too.
Suzie: And the worst.
Gwen: Yeah, tell me about it.
Suzie: Funny thing is, you always imagine when you're dead, "they're going to miss me at work", "indispensable". But look what happened. I got replaced. By someone better.
Suzie: You can't even look at me, can you? It's not like you to be so judgemental.
Toshiko: It's not like you to go on a murder spree. (Pauses) Alright, so it drives us mad, this job. God knows I've done some stupid stuff. But now I've got to keep on working every day in a job that's got a bit less honour, because of you.
Gwen: (On entering the Wolf Bar) Bloody hell, like I didn't have a banging headache already
Suzie: (Via intercom) That's the glove, Gwen. It gets inside your mind.
Gwen: Yeah, alright, Suzie, stop creeping me out.
Owen: The amnesia pills. How many did you give him?
Suzie: One a week, every week. For two years.
Owen: Christ, no wonder.
Captain Jack: What the hell did you do that for?
Suzie: I wanted someone to talk to. About this place. It was driving me mad. He was just… he listened, that was all. He just listened. Every week, as soon as I'd finish talking, I'd give him the pill.
Captain Jack: You overdosed him.
Suzie: I didn't know that. Keep getting it wrong, don't I? Is that why you brought me back? Did you think I wasn't guilty enough?
Toshiko: (As they go through Suzie's belongings) That's all we are in the end. A pile of boxes.
Owen: It wouldn't be our Suzie. She wouldn't go to that support group bollocks.
Gwen: How do you know? I mean, were you friends? Any of you? Who was her best friend in this place?
Owen: She sort of, kept herself to herself.
Gwen: Well, then, if she needed to talk, maybe that's exactly where she'd go. A group of complete strangers.
Captain Jack: (About the Resurrection Gauntlet) It fell through the Rift about forty years ago, lay at the bottom of the Bay till we dredged it up. I always figured this wasn't just lost. Whoever made it wanted rid of it.
Captain Jack: Ianto, how many people have we given amnesia pills to?
Ianto: Two thousand and eight.
Owen: Hey, what if they all become psychotic?
Tosh: Do you have to sound so happy?
Owen: Still, at least we've got a head start. If it's someone we've pissed off, that narrows it down to, oh, four or five million.
Captain Jack: And that's just the humans.
Detective Swanson: It was only a matter of time.
Captain Jack: What was?
Detective Swanson: Torchwood walks all over this city like you own it. Now these people are paying the price. Ordinary people, ripped apart, with your name written in their own blood. From where I'm standing, you did this, Captain Jack Harkness. You did it.
Detective Swanson: Looks like somebody wants your attention.
(Jack looks above the bed; Torchwood is written on it in blood)
Captain Jack: They've got it.
International air dates:
Australia: August 7, 2007
Israel: July 1, 2007
Mexico: August 27, 2007
Sweden: August 5, 2007
United States: October 27, 2007
Canada: November 23, 2007
New Zealand: August 27, 2008
Germany: April 29, 2009
Yasmin Bannerman also appeared in the Doctor Who episode "The End of the World", as Jabe.
An alternate title for this episode was "They Keep Killing...", to conceal the fact Suzie would be returning.
Owen: Yeah, I'm just saying, Mean Streets!
Mean Streets is a 1973 film by Martin Scorsese staring Harvey Keitel and Robert De Niro portraying the murder and mayhem on the streets of Little Italy in New York City.
The Briscoes, the couple murdered at the start of the episode, may be a possible reference to the character of Briscoe in The Quatermass Experiment , the 2005 remake of which featured Indira Varma as Judith Carroon and Doctor Who's David Tennant as Briscoe.
When Suzie is lying on the ferry landing after being shot by Jack multiple times she begins her statement about something coming for him with "Captain! My Captain", which is a truncated version of the opening line of Walt Whitman's poem of the same name. He wrote it in response to his grief over the assassination of a man he adored and admired, President Abraham Lincoln.
The title "They Keep Killing Suzie" may be a reference to an episode of the TV series The Avengers entitled "They Keep Killing Steed".
The poetry of Emily Dickinson features heavily in this episode. Dickinson (1830-86) was an American poet, born in Amherst, Massachusetts, where she lived her entire life. She was a prolific writer with over one thousand seven hundred poems written, although only ten were published in her lifetime. She lived a very quiet and sequestered life, and many of her poems feature themes of loneliness and mortality. The vast majorities of her poems were not titled and are instead known by numbers, which were first attributed to them by the editor Thomas H. Johnson in 1955. Poem 712, which begins "because I could not stop for Death", is Max's trigger to start the lockdown. They also try using poem 67, which begins "success is counted sweetest", to try and break the lockdown.