When Candace loses a gift Jeremy made for her, she asks Phineas and Ferb to go inside her mind and help her recreate it. I thought that this was a great episode. I really liked the allusion to Inception, which is an awesome movie.
I thought the idea of this episode was inspired and very interesting. I found myself laughing and being thrilled at the same time.
I do believe that this show is getting better all the time, and I personally can not wait for the fourth season.
A perfect episode, with action and humor to keep entertained.