I almost thought American Dad was headed for its first clunker of the season, but that last segment with Stan and Francine in Roger's brain is easily the trippiest and funniest stuff on Sunday night. The visuals of Stan running across a field of Oreos and running afoul of a Chocodile was delicious (ha!). Won't spoil the payoff, but it doesn't disappoint.
The B-plot with Steve and friends at camp didn't work so well. Usually, Steve and company bring the goods, but they had an off-week.
It's the kind of thing that can be very funny and clever if done sparingly (like once every two seasons or so) but if they resort to doing it once a season or more, it will get old fast. They did it well with The Superfriends opening a few years ago.