"The Index Case" is the seventh episode of the 29th series of Casualty, and the 922nd episode overall. It was preceded by "The Last Call" and followed by "Return to Sender".
A man dies from a mysterious injury, leaving Connie wondering whether she missed something.
It's Dixie’s first day back after the crash. Troubled, she confides in Big Mac.
Ash is feeling down after the accident and Dixie gives him the cold shoulder. Meanwhile Ethan is feeling restless, and Cal helps him move into his new flat.