Owen: Give Ianto a stopwatch, and he's happy.
Ianto: It's the button on the top.

Owen: How'd you know that?
Ianto: I know everything! And it says so on the bottom of the screen.

Owen: I hate the countryside. It's dirty, it's unhygienic. And what is that smell?
Gwen: That would be grass.
Owen: It's disgusting.

Owen: I started looking into devil worship and stuff from that era [the 1800s], see if there's anything about plucking out hearts, and would you believe it, there's nothing! They ate eyeballs, they drank blood, they had sex with animals, but they did not pluck out each others' hearts, because obviously, that would have been weird.

Owen: If it's someone we've pissed off that narrows it down to 4 or 5 million.
Jack: That's just the humans.

Owen: Make yourself useful, sweetheart; pass us the big chisel from the toolbox.
Gwen: Not sweetheart, Gwen. One syllable, sure you can manage it.
Owen: Not sweetcheeks? Freckles? New girl?
Gwen: [getting out chisel] It's a shame your tool's not big enough for the job, darlin'. Catch!

Owen: So the protein chains are regenerating despite the mutilations, so not only is it replenishing its own flesh, but it's increasing it, giving them a brand new meat supply.
Gwen: It would last them for years, then.
Toshiko: If we understood how worked, we could feed the world!
Ianto: We could release a single.

Owen: Why should you get away with it? You said you were sorry, said you didn't want to hurt her, but you didn't STOP! What if I didn't stop? Would I be sorry?
Gwen: Owen, no...

Owen: Yeah, I was brought back. Like Jesus really, but without the beard, you know. Shit, I'm never gonna have a beard. Not that I wanted one, you understand, but you know, one day I...

Owen: [about Gwen] That's the kind of daughter every mother must dream of. Cool as ice, packing an automatic.

Owen: [Opening narration] My name is Doctor Owen Harper, and this is my life. A life that is full of action. And violence. And work and wonder. Secrets. And sex. And love. And heartbreak. Death. My death. The death I survived. The death I'm now living through. Except.... this isn't living. Every day is the same. I get up. Get ready for work. Same as everyone else. The thing is, I'm not the same. I get to work and everyone is doing the same old thing. Babbling away about aliens, weddings. I'm not real. Three days ago I died. And they think I'm fine. But they're wrong.

Owen: [to Jack about him trying to drown himself] You were watching?
Jack: Skinny guy in tight jeans runs into water? I was taking pictures!

Owen: [while cleaning Gwen's shotgun wound] There's going to be a certain amount of residue, so just lie back and think of Torchwood.

Owen: If you're not a figment of my imagination, then I don't know what's happening anymore. Maybe this is what a mental breakdown feels like.
Jack: You're fine. It's the rest of the world that's delusional.

Owen: It's a kind of alien egg. But don't worry, I'm going to look after you, I promise. We've got procedures for this situation.
Gwen: You mean, this has happened before?
Jack: You've heard of immaculate conception, haven't you? Well...