"Waiting for a Star to Fall" is the 872nd episode of Casualty and the 5th episode of the 28th series. It was preceded by "What You Believe" and followed by "Scars". This episode featured the arrival of Iain Dean as a paramedic and main character, following two guest appearances in Sam's flashbacks in 2012.
As a car comes to a halt in a busy road, a bus filled with passengers swerves, clips a central reserve and crashes on its side.
While most passengers get clear, a young girl named Lucy is pulled to safety as another passenger runs. With the paramedics on the scene, the injured are rushed to the ED.
When a wounded man stumbles into the hospital's reception looking for treatment, Charlie soon realises that he must have been involved in the bus crash. But why was he not treated at the scene and picked up by the paramedics?
Meanwhile, Lily is told to work alongside Rita in order to improve her cold bedside manner.
Elsewhere, Tom asks Sam to move in with him.