Happy Birthday, Cancer

S1 E8: Lenny (Idris Elba) invites Cathy (Laura Linney) to the Bahamas for an art opening to celebrate her birthday, but Paul (Oliver Platt) throws Cathy a surprise party and invites her flaky college friend, Rebecca (Cynthia Nixon).  Lenny and Cathy lie about their relationship to Paul. Sean (John Benjamin Hickey) and Rebecca start a fling.  Adam (Gabriel Basso) finds Marlene (Phyllis Somerville) in the backyard disoriented and wandering around.