Dr. Leslie Berkowitz is Penelope's boss and a friend of the Alvarezes'. He doesn't like confrontation and has trouble saying no to his daughter, Katie, who takes advantage of his inability to stand up for himself. Leslie is Jewish and can speak Yiddish. He is good friends with Lydia although he clearly has feelings for her and those feelings are returned. He was dating another woman, Esme, in order to make Lydia jealous but broke up because she wasn't Lydia.