This episode is about Charlie and his mother - always fun - except this time they get along, sort of. The sub plot is Alan and a mentally unstable woman. Jake doesn't really play a part in this episode.
This episode has a great plot. Charlie getting on with his mother was extremely funny although only for people who watch Two and a Half Men regularly. For people that don't, this episode would have completely washed over them. The actress who plays Evelyn Harper, Holland Taylor, finally gets the screen time she deserves in this episode. The plot twist at the end is fantastic and is one of the great Two and a Half Men mother moments.
The sub plot with Alan is also good fun and is used well although it was a very unimportant part of the show and took up only 2 scenes.
This is a good episode and continues the good start to the season