Episode 4 (S01E04)

Joanna becomes fixated on uncovering the identity of Sally McGowan. Michael is appalled by Joanna's actions and confronts her about how she frightened a child in London. Undaunted, she thinks a painting from a prison could hold the key to the mystery. After losing her job, she hurries to Kay’s place and helps her escape from a dangerous gas leak. Joanna informs Zac, but when he reveals Liz's secrets, Bea realizes that Joanna was behind the information leak.