The first episode to feature someone other than Jake (Angus T. Jones) in voiceover for "Previously on...". In this case, it's Alan (Jon Cryer).
Paula (Paula Marshall) and her ex-wife Rachel (Diane Farr) also appeared in Californication (2007) as girlfriends of Hank Moody (David Duchovny).
Alan doesn't mind his break up this time. Gets plenty of lesbian make out fantasies of Paula and Rachel.
Jenny actually commits to one girl.