'Ringer' recap: My Bologna Has A First Name. It's GEMMA!
As for the rest of it? Well, NA Charlie is keeping Gemma bound, gagged and blindfolded in the basement of his real house. Remember how Bridget brought a jonesing Malcolm to Charlie's apartment? Well, that's his fake flat. Mal twigs to this early on, when he notices Charlie has alcohol-laden mouthwash in his bathroom (which people in recovery eschew). Additionally, Mal notices the TV remote hasn't been used. The batteries or battery compartment, or perhaps the remote itself (sorry my notes suck) are/is still wrapped in plastic. Malcolm lets Bridget know something's fishy with her new sponsor.
Bridget decides to go see Siobhan's therapist. She wants to understand why Siobhan killed herself. The therapist is surprised that "Shiv" booked her appointment under her real name. Bridget declares herself the new "Shiv" and manages to get the therapist to confirm that the alias Siobhan used was "Cora" (the name Tyler called her, when she met him at dinner last week). It is during this session that Bridget realizes she is falling in love with Andrew.