Donna refuses to accept that Derek's cancer is terminal. She wants a second opinion; could Ric be wrong? Could the scan be faulty? Chrissie tries to distance herself from Oliver after Mark has noticed them flirting, but when she sees Oliver struggling she can't stay away for long. Elliot and Tara excitedly test their experimental procedure on a pig's heart. Penny finds herself in deep trouble with Connie and Jac when she arrives late for an operation.