I'm shocked the Wire trailer doesn't include more scenes with Idris Elba (Stringer Bell), both because of how big a role Stringer played in the series and how famous Idris has become as an actor.

I totally agree about Season 4. I'm watching it again for the Nth time (I've lost count how many times I've watched it all the way through). I might switch 3 and 1 in your order of best seasons, but it's so close it's negligible.