Nightfall

"Nightfall" is the 183rd episode of Casualty and the 7th episode of the 11th series.

Synopsis
Josh and Liz are called to a boathouse where an old woman, Lily, tells them her granddaughter Lucy has fallen through the roof. When Lucy is fit by debris, Josh inserts a chest drain under instruction from Mike but Lucy later dies in Resus. Anna gives medicine to her baby son Peter, who has a degenerative neurological disorder. When her young daughter Natasha gives him an extra dose, Anna delays taking him to hospital, wondering if it would be kinder to let him die. Kate learns the truth but sympathises and helps Anna come up with a cover story. Older man Phil and youngster Ryan go after Parker, the drug dealer who sold drugs to Phil's daughter Karen when she died of an overdose. Ryan puts a stop to Phil's assault on him and they end up in a car accident that leaves Ryan badly hurt. Ryan tells Phil Karen's death was her own fault for mixing drugs. Richard and Matt stop Phil attacking Parker again and he breaks down in tears.