Character mistake: Rufus says "That was before I found out you raped my 14 year old daughter." referring to Jenny. Jenny, in previous seasons is 15. Jenny was born in 1993, and season 4 was filmed in 2010, making Jenny 16 at least. (00:25:35)
Suggested correction: In this scene, Rufus saying, "my 14 year old daughter..." was referring to Jenny's age at the time Chuck tired to force himself onto her (beginning of the first season), not her current age in season 4. Jenny was 14 in the beginning of season 1.
Character mistake: In the final show, when Nesa and Smithy are getting married, Smith states his name as Niel Noel Edmund Smith, but that is actually his son's name, a.k.a. Niel the baby.
Character mistake: Roxy always calls her mother Marda, but in the first episode, she is on the phone with her and she says, "Mom, I gotta go."