It is revealed in Klein's backstory that he and Ari once worked together at the Terrance McQuewick Agency until Terrance's partner, Jim Oliver, broke away to create his own agency, taking Klein and many other agents as well.
Because of Drama's hardship with not having any meaningful scenes on the show, Ari helps Drama get off the show in exchange for helping Coakley land a membership at an exclusive country club.
Reeves was brought into the cast while she was shooting.
Unlike those who came before Lloyd and the other replacement assistants over the course of the series, Jake proved to be a reliable assistant until the end of the series.