Elizabeth Corday, M.B.B.S., F.R.C.S. is a fictional character in the medical drama series ER, portrayed by British actress Alex Kingston. She first appeared at the beginning of the fourth season and became a lead character before departing towards the start of the eleventh season.

The eleventh season of the American fictional drama television series ER first aired on September 23, 2004, and concluded on May 19, 2005. The eleventh season consists of 22 episodes.