This has been my favourite show since it came out but, just like Season 3, I'm disappointed with the first few episodes.
Where are the recurring characters? Where are Stuart, Dr. Gabelhauser, Winkle, etc? They haven't even been to the comic book store. I also feel like they're moving more towards a standard sit-com forumula instead of doing quirky and unique science stuff like they did the first two seasons.
Anyway, I'm sure it'll pick up, the show is gold!