Mary-Claire is shocked to learn that Edward stood her up for his ex-wife Serena, and when challenged on it he bites back, eager to bury the fact that they had a relationship in the first place. Goading, she wonders what Serena would think if she found out; but when threatened, Edward gets nasty... Elliot goes the extra mile, having been encouraged by Guy to do an impromptu heart operation using the Herzig on a vulnerable patient. When he doesn't get the results he was hoping for in theatre, Elliot is troubled; his ego getting the better of him, and he's left with a deep sense of guilt for his young patient. Arthur's obsession with everything Chantelle draws to an abrupt end when Zosia, needing to find a new flatshare, bets him that he has to go a whole day without mentioning his ex-love's name, or she wil