This season isn't bad, but I'm just not nearly as amused by it as I was seasons 1-3. Those first few seasons were enough to draw me in, and I don't know if I'd have started watching if this season or last had been the first one I saw.
I think the Archer Vice concept really is sound, but they're not really pulling it off like I hoped.
The whole "Southbound and Down" episode was an homage to Smokey and the Bandit. Similar premise and all, including the Trans Am and Archer's whole appearance. In fact, the theme song to Smokey is "Eastbound and Down," which is where they got the title, and it's the song Cherlene sang at the end.
I don't think you have to have caught all the references for it to be funny, but they usually do such a great job when Burt Reynolds is the source material that I had high hopes for this week's episode. The swamp episode where they talked about Gator constantly was hilarious, and I recall the one where Burt Reynolds guest starred being pretty solid, too. This week's, however, wasn't even close to as good as the Gator one, and I'm pretty sure it didn't match the guest-star episode, either.