Inside the house, Sarah's showing off her terminator expertise by deducing that it's not after David but one of them two. "Someone's not telling me something," she says. "David doesn't know. It's not his," says Anne. "You're pregnant?" says Sarah. Since she says she can only help one of them run, looks like it's going to be Anne. She hides Lauren in the closet while she helps Anne to Roger's truck. You really think it's still going to be there by the time you make it over? Lauren assures her mom she'll be OK. "You sure?" asks Sarah. "I mean, I'd rather be making birdhouses," says Lauren, and maybe you two can have a touching moment when a terminator ISN'T RIGHT OUTSIDE.
Back in the present day, Anne's breathing is getting worse; her intubation jar is filled with blood. She apologizes to Lauren for doing this to her. Lauren's upset because she doesn't know what this is about. "It's about you and your little sister," says Derek. Lauren asks how he knows ... ohhhhhh. "You're from the future," she says. Derek says her sister's name is Sydney (well, if it wasn't before, it will be now), and he knew her.
Back to 2027, where the radio room door is opened by a gaunt brunette. Like if Wednesday Addams looked less healthy. "Those gas masks, they won't help. You're already infected," she says. Not much for small talk, this one.
After the commercial break, Derek looks outside the bunker at the sunlight and says they'll have to wait until nightfall to head back to Serrano Point. Jesse tosses something called "plumpynut," which is peanut butter mixed with baby formula and vitamin powder. Hope it tastes as good as it sounds. "You guys are growing your own food again?" says Derek. Jesse says it beats chasing rabbits, and this was all set up so Derek and Jesse can talk about the invading rabbit population in Australia that the country tried to wipe out, including with a disease, but a few survived and so in a few years the country was overrun again, and I'll spare you the details because I'm pretty sure you all get it.
Afterwards, she asks Derek for his canteen because she's parched. Derek hands it over, and wipes the sweat from his brow. He glances over at Sydney, and then suddenly wants to leave now. "In broad daylight," says an incredulous Jesse. Derek doesn't say anything, so Sydney does: "It starts with a dry mouth. And then the sweats. And the fever and shaking starts. And then your lungs fill up with fluid and then you die. You don't have much time. It's coming." Debbie Downer here must be a lot of fun at parties. "Let's go," says Derek, and Jesse checks her own forehead for sweat.