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Episode 4
Episode 4 of 4
The murder trial continues, with Costley's lawyer, basing her defence on evidence that Costley suffers from a personality disorder which would have impeded his ability to react normally,
Last on
Fri 24 Feb 201701:50
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Mad or Bad?
Duration: 00:58
Cast and Characters
Learn more about the characters in BBC One's psychological thriller.
Screenwriter Amanda Coe on bringing Apple Tree Yard to BBC One
How the book was bought to life
Author Louise Doughty: From page-turners to primetime
The razor-sharp writer behind the Apple Tree Yard novel
