A blast from the past shakes up Fiona's view of her life. Meanwhile, Frank gets involved with Liam's school PTA; Lip learns getting laid is harder than anticipated when sober; and Kev and V take a trip to meet his birth family.
Stars: William H. Macy, Emmy Rossum, Jeremy Allen White
Director(s): Regina King
Writer(s): John Wells, Paul Abbott, Dominique Morrisseau