Fatal Error - Part One

"Fatal Error - Part 1" is the 985th episode of Casualty and the 25th episode of the 30th series. It was preceded by "Just Do It" and will be followed by "Fatal Error - Part 2".

Synopsis
Lofty earns a small victory when he steps up and asks a disruptive patient to leave, but it backfires when the patient is brought back into the Emergency Department with a life-threatening injury. They manage to save her, but another silly mistake causes agency nurse Diana to receive a defibrillator shock. Lofty is distraught - will he be able to save his career?

Big Mac attempts to apologise to Noel for his deception, but Noel is having none of it. Has he lost his friend forever? Louise tries to get to the bottom of his misery but he fails to tell her the truth, and ends up popping a few painkillers again.