At the end, Peter is sentenced to only a week in jail - this is so that he'll be out in exactly one week's time - in other words, in time for the next episode. Ironically, this joke didn't work out as well as the producers had planned - a new episode didn't air for nearly two months after this one.
This episode features both Carrie Fisher (Angela), and her mother Debbie Reynolds (Mrs. Wilson).
The tattoo Frank Sinatra Jr. sports on his upper right arm is the Japanese character for "sheep". It insinuates that he and Brian have accepted the change in the club and are blindly going along with it.