I, too, enjoyed both "Desperate Housewives" and "Brothers and Sisters" last night.
SPOILER
"Desperate Housewives" seemed a transitional episode, of sorts.  It was interesting to see Dixie Carter introduced as Orson's mother...and one who may out-evil Orson...and to learn about the new neighbor's dirty secret.  Poor Lynette...she owes him her life, but....
I am looking forward to Mike getting his memory back...and I'm hoping when he does that Edie is totally embarrassed/humiliated/dealt with.
On "Brothers and Sisters", I couldn't help sticking my finger through what I thought was a gaping hole in the story line.  Justin being re-called to the Army should not have been a major deal with all that high drama, etc., etc.  The Army would not want him back if it knew he had a drug problem.  Plain and simple.  They don't tolerate drug/alcohol abuse.
I'm guessing that his drug use hasn't been a legal issue, and he didn't want it to become one.  But it surely would have been his out.  No need to overdose and induce a coma, for pity's sake.