This is a great episode, however not the best season opener. The story is based around Jake preparing for a new school. Subplot = Charlie has a rash on his privates.
The episode is very funny and has some great Two and a Half Men classic moments. The problem with this episode is that there isn't enough Charlie.
Although the story has never been hugely necessary or hugely important in these types of comedies this one was particularly weak, it needed slightly more substance to work.
The comedy was still good though and, although crude, the rash was still a funny addition to the episode. Overall the episode is a good one and I look forward to the rest of the season.