Good things:
The Doc's warning about the bats and Ryan's subsequent background actions.
The credits and next-time trailer

Bad things:
Everything else.
I mean, there's the rushed pace of the plotting, with situations that would normally take a third of an episode or even a whole part of a classic four-parter resolved in a seconds. There's the comically (but not actually comically) useless repairmen and his grumpy kid who's a secret genius but not so clever as to have a sulk in a corridor filled with flesh-eating monsters. There's the concerns about lack of oxygen when there are fires visible on screen. There's the utter failure of what the writer wanted to be a "HOLY FUCK THIS EARTH" moment that had as much emotional impact as discovering you're wearing slightly differently coloured dark socks. There's the woman's constant scream of "BENNI" as if 'Crossroads' never happened (thank god her husband to be begged in voice over to be removed from the episode). And now I'm angry again so will have to go and calm down.