Ostrich Syndrome

"Ostrich Syndrome" is the 845th episode of Casualty and the 23rd episode of the 27th series.

Synopsis
The medics are overwhelmed by the continuing flu outbreak, and with Zoe off sick, Ash and the team are pushed to the brink as they struggle to deal with the crisis. A man's attempt to track down his estranged wife leads to a car crash, but once in the ED he reveals how she might be able to save their son, the boy she abandoned as a baby 10 years ago and who is now fighting leukaemia. Fletch tries to convince Tess he didn't encourage the attention of trainee nurse Aoife.