Passionate defence barrister Martha Costello faces challenging cases and surprising clients, which test her faith in the criminal justice system. Gifted colleague Clive Reader is called to the bar with her. They work hard with pupils, Nick Slade and Niamh Cranitch, but ultimately only one can eventually be taken on as a member of chambers.

• Maxine Peake
• Rupert Penry-Jones
• Neil Stuke
• Theo Barklem-Biggs
• John Macmillan
• Alex Jennings
• Frances Barber
• Amy Wren