I read a review of this episode by the AVClub a few days ago where the writer said "Top Banana" was one of those rare post-Pilot episodes where the episode was even better than the pilot episode. I agree with that sentiment. Here, we get the same dynamic the pilot episode introduced to us but cranked up a few notches. The jokes are more fast-paced and subtle, while the Bluth dynast grows even more complex.
The episode introduces us to the next most profitable piece of the Bluth family now that the company is in shambles: the banana stand. George Bluth created it as a means to make a little extra cash; Michael worked there as a child and now, George Michael has taken the role of Mr. Manager. Michael struggles to get the flight records of the company and learn why exactly his father's in jail. And with the help of T-Bone, the flamer (no, not THAT kind), George is making sure it stays that way. Meanwhile, Gob looks for more important things to do in the company, with Lucille's help, while Tobias continues his hunt for an acting job.
Once again, most of these plot points wind up connecting with each other in ways Larry David wishes he could accomplish on an episode to episode basis. When the storage unit goes up in flames and the fireman says, "Looks like the work of a flamer," the joke is landed, and once again, we're left laughing at how Hurwitz and co. can so successfully create double entendres and duel meanings out of the simplest stuff (this is also a precursor to the way that Tobias will frequently says things that are sexual without meaning to). Also the "fire sale" that's in the commercial Tobias is auditioning for ties into the "flamer" joke and the rest of the fire related plots.
But boy, there are some great jokes and sight gags here: Gob continually returning dead animals to the pet store, the "Mr. Manager" discussions, Tobias' entire insane audition for the "fire sale, Lindsey's "best hair" picture... great stuff. And to think, this was only the second episode.