Showtime 2, 9:30 p.m. ET
Promos for Monday’s episode of Web Therapy promised a very special mystery guest star. The mystery was solved Monday night, when it turned out to be Julia Louis-Dreyfus, playing the sister of Lisa Kudrow’s Fiona. The two actresses had a great time acting out a vicious verbal duel of sibling rivalry – so if you missed it Monday, here’s a convenient chance to catch up.