"Bad Timing" is the 20th episode of the 28th series of Casualty and the 887th episode overall. It was preceded by "For Auld Lang Syne" and followed by "Brothers at Arms". This episode sees the arrival of Ethan Hardy, portrayed by George Rainsford.
Dixie is shocked as she is called out to her on-off girlfriend Carol, who has fallen down some steps hurting her wrist. However back at the ED Carol takes a turn for the worse leaving Tess and Zoe fighting to save her life. Meanwhile, a teacher is shoved through a glass-fronted stall as she tussles with a woman attempting to steal her bag, and back at the ED new doctor Ethan and Lily find further unexplained symptoms and set about discovering what really is wrong with her.