If you're getting a bit fed up of Grey's Anatomy after 300 or so seasons, there's a brand new medical drama to sink your teeth into tonight. Set in the highly stretched ER of Angels Memorial Hospital in LA, where a 'code black' - when there are more patients than resources - occurs regularly. At the heart of the action is residency director Dr Leanne Rorish, played by Marcia Gray Harden, and this opening episode sees her putting her four first-year residents to work on their first day.