"Cuckoo's Nest" is the 825th episode of Casualty and the 2nd episode of the 27th series. It was preceded by "Kansas" and followed by "Rock, Paper, Scissors". The episode was directed by Nigel Douglas and written by Steve Bailie.
When a baby's condition suddenly deteriorates it is left to Tom to revive her, while Dylan starts to accuse the mother of inadvertently passing drugs through her breast milk. Meanwhile, Tamzin and Jeff attend to a lap dancer who has collapsed at work, and Sam attempts to unravel the mystery of a patient with amnesia.