As business booms at her DNA-based matchmaking service, co-creator and CEO Rebecca Webb seems unstoppable - until a body is found in the Thames.

Cast: Hannah Ware, Diarmaid Murtagh, Wilf Scolding, Lois Chimimba, Eric Kofi-Abrefa, Gregg Chillin, Zoë Tapper, Jana Pérez, Geraldine Alexander, Paul Brennen, Louis Hunter, Stephen Campbell Moore, Dimitri Leonidas, Deeivya Meir, Indigo Griffiths