Great episode!
It didn't answer any of the questions we've been focusing on, but that's just makes for the wonderful frustration any great show builds. Always leave us wanting more right?

I like that we're getting back to the questions about the zombies. First Tanya was talking about running more experiments and now we ground zero coming back into focus.
I seriously think the season finale is going to involve a mad dash to Fort Irwin and then end with the discovery that someone, most likely someone with knowledge of what caused the outbreak, is already there.