2x09 Do You Remember Moon Flower?
The flashback of how Thackery was connected to Captain Robertson was surprising but no surprise Robertson was covering up illnesses back then and Barrow's wife blackmailing him was great as he was rubbing the fact the other woman was getting a better deal in her face, Lucy's father having a stroke in a sex club was karma for the way he treated her and that fire was a little continent considering they were going to the police