I've played the extended episode of the series finale on two DVD players, a 2005 Sony and a 2007 Philips, the Sony will freeze on at least two points. Pausing the Sony at the point where the suicide bomber blows up at the portal or going < or > and then play will freeze, it happens again at about the point where Taylor tells Maddy Shannon's soldier boyfriend to find that cargo container. The standard length episode won't do that, no other episode does it, no other DVD I've ever had does it,my Philips and my brother's XBox play with no problem. Bug in the episode, or DVD player?
I don't remember exactly what you get but the sticker you saw gives a basic idea. The series finale The finale, extended version, (I'd need to take careful notes on both to tell the difference). There's a black box on the back side of the case telling just what it has. The usual gag reel, 2 or 3 specials and a commentary or two on an episode(s).