"Twas the Night" is the ninth episode of the eleventh season of ER. It first aired on December 9, 2004. It was written and directed by Julie Hebert. It's a Christmas episode that has Abby Lockhart treat a man with lupus and makes a boldly decision without consent from the patient's "on call" doctor while John Carter and the others work to help a homeless family. Unable to get someone to cover her shift to care for her ailing father, Jing-Mei Chen quits the hospital. This was also the final episode of Ming-Na, who portrayed Chen.