SEASON PREMIERE: Season 3 begins with a doubleheader, introducing a welcome pattern of brief but entertaining appearances by familiar guest stars. In the first of tonight’s two episodes, Shiri Appleby (remember her all the way back from Roswell?) reprises her role as Adam’s ex-girlfriend, Natalia, confronting Adam (Adam Driver) and Hannah (Lena Dunham) with angry assistance from Natalia’s new friend, played by Amy Schumer. In both, Jessa (Jemima Kirke) is confronting people at rehab, and one of them – played by Richard E. Grant – eventually pushes back.