This is the first episode where John Connor does not appear.

Sarah: I need to get you out of here now, someone is coming. I'm not here to rob you.
David Fields: Then put down the gun.
Sarah: You don't understand, you're in danger. We need to go.

Anne Fields: Why would you keep a gun in the house?
David Fields: For situations like this. Or a bear.
Cameron: (examining the gun) This wouldn't work in a situation like this.
Anne Fields: Why didn't you tell me?
Cameron: Or a bear.
David Fields: Because I knew you would react like this and this is not helping.
Anne Fields: (to Sarah) Does your son know you kidnap people at gunpoint?
Sarah: Yes.
Anne Fields: Then you know he'll be prone to delinquency himself.
Lauren Fields: Mom, I think it's obvious she's well beyond Dr. Phil.

Anne Fields: Do you think David could be alright?
Derek: Anything's possible.

Derek: Your plan sucks, you can't use metal for this.
General Perry: They hit Eagle Rock Bunker with a bio-weapon that killed everybody inside. Only one person survived out of two hundred. Now we need her back here, alive. Metal is immune to disease so we're sending in metal and...
Derek: Tin cans are immune to disease, but not immune to going bad and putting a bullet in the skull of a person out there who could save us from this plague. I'll find the survivor, I'll bring her back.

Sarah: No one gets left behind.
Anne Fields: What about your daughter?
Sarah: She's not my daughter, she's one of them, from the future.

Jesse Flores: (to Derek, pointing a rifle at him) Excuse me. You're fly is open.

David Fields: So what guarantees he comes through the front door?
Sarah: They always come through the front door.

Jesse Flores: You the one? Who sent the signal? (both lower their drawn weapons)
Derek: No.
Jesse Flores: My shore party picked up a coded SOS about 45 ticks back. Sent me to fossick around.
Derek: What's that in English?
Jesse Flores: It means someone's still alive inside. Probably a civilian. Probably hiding. Radio room I'm guessing.
Derek: I didn't go in that far. What did you say about a shore party?
Jesse Flores: We're making troop and supply runs back and forth from Perth for months. Seawolf sub. The Jimmy Carter.
Derek: You've got a nuclear sub? Who drives it?
Jesse Flores: Not who, what. We've got a scrubbed Trip-Eight for a captain.
Derek: You've got metal running a sub?
Jesse Flores: Well if you find me a sub commander who survived J Day and I'll switch him in. Have a little faith, mate, she'll be apples. Means we'll be alright.
Derek: You believe that?
Jesse Flores: Sure as my mother loves me.
Derek: My mother's dead. Here. (hands Jesse a gas mask)
Jesse Flores: Gas?
Derek: Bugs.
Jesse Flores: This gonna work?
Derek: Probably not.

Anne Fields: So you're from the future, like them? Like those machines?
Derek: Yeah, yeah like them.
Anne Fields: In the future, you know my baby? So does that mean she makes it?
Derek: Your daughter Sydney has an immunity, in her blood. She helps us cure a deadly disease, she saves a lot of lives.

Six months ago at the Fields' cabin, Cameron is thrown through the window by the T-888. The next scene shows it walking towards the cabin a considerable distance away. Why would it retreat and not just enter?

Jesse Flores: We're making troop and supply runs back and forth from Perth for months. Seawolf sub. The Jimmy Carter.

The USS Jimmy Carter is a real world nuclear submarine in service in the US Navy.

Derek: Rabbits? I thought Australia was all wombats and wallabies and stuff.
Jesse Flores: No. Some wacker brought 'em over in the 1800s and we've been overrun with them since.

Rabbits have been a devastating problem for Australia's ecology since the 19th century.

Derek and Jesse's first meeting is shown in this episode. It was referred to in episode 2x06, The Tower Is Tall But The Fall Is Short.