This season has begun rather weak and this is finally a good episode.
Alan taking Charly's place, that's a great idea! There was nothing too outrageous this time like burning down a house or such.
For me, the show works best when it has the old storylines like in the first couple of seasons, why change that? If you must bring in a new character, bring back Chelsea.
Also I'd like to see mire of Judith, Herb and, above all, Rose! What else is there to say? Don't wanna talk too much about this particular episode as it would just spoil it.