Jane Lynch of "Glee" reprises her character of psychiatrist Dr. Linda Freeman. At the end of the episode, Charlie and Alan are watching "Glee". Charlie remarks that "the tall, blond chick in the red track suit is really starting to freak me out", referring to Lynch's character in "Glee". Alan mentioned earlier that the "Glee" episode is 'Wang Chung'. There never was a 'Wang Chung' episode.
This is the last show in which Dr. Linda Freeman (Jane Lynch) is Charlie's therapist. In future shows, she counselled Walden, instead.
Alan mentions a website called "Danish Munchers". On the day it aired (December 13, 2010), and for that day only, the number of searches for "Danish Munchers" more than quadrupled.
This is season 8 and Jake came to live with Charlie at age of 10. Charlie and Alan are talking about Jake's birthday and that he recently turned 16..
Episode title spoken by Alan, to Charlie.