This was a decent episode but I don't get why the police and councilwoman didn't wait until sunrise. The van was impervious to attack. Heck couldn't the have gotten to a helicopter? What's really left to learn about stopping the Master from the Occido Lumen

I would focus a bit on back stories. Michonne is cool. Every show can't be constant danger either. The Zombies are going to get smarter and the water in the prison is bad. Good stuff.