S2, E1: Alan feels hurt when Charlie asks him to stay out of the house while Charlie's buddies come over. Then Alan is further rejected when he learns that his old friends aren't available because they're all at his ex-wife Judith's house for a get-together. Charlie's stalker, Rose, attempts to cheer up lonely, brooding Alan, but only an invitation to join Charlie's elite male support group will make him feel better.Oscar and Golden Globe Award winner Sean Penn ("Mystic River"), Grammy Award winner Elvis Costello, SAG Award nominee Harry Dean Stanton ("The Green Mile") and Bobby Cooper ("I Am Sam") guest star as themselves (Charlie's support group).