This episode marks exactly one year elapsed in the story line from the pilot to now.

Skyler: I don't have any of your magic, Walt. I don't know what to do. I'm a coward. I... I can't go to the police, I can't stop laundering your money, I can't keep you out of this house, I can't even keep you out of my bed! All I can do is wait. That's it, that's the only good option, hold on, bide my time, and wait!
Walter: Wait for what? What are you waiting for?
Skyler: For the cancer to come back.

Michael: Lydia planted this thing, not the cops. She's thinking if she makes it look like her inventory's being watched that we'll leave her alone and take our business elsewhere. And she's right, we will be taking our business elsewhere, right after I leave her alone in a ditch.