Shaun Evans

Delia Balmer, the protagonist of ITV’s true-crime drama Until I Kill You, is a singular sort of person. She’s a “traveller”, not a “tourist”; a “female” never a “woman”, with the sharpest of tongues.

Balmer, played by Anna Maxwell Martin, is isolated. Living alone in a run-down flat in London’s Kentish Town in 1991, she is virtually friendless at the hospital where she works as a nurse, and her family lives overseas.

When Delia Balmer first met John Sweeney in a Camden pub in 1991, there was no way of knowing the kind of monster he was. Affable and charming, she was immediately drawn to his creative, free-spirited nature, and they began a romantic relationship.

This magnetism quickly faded: John Sweeney was a psychopathic serial killer.

Anna Maxwell-Martin (Motherland) will star as Delia Balmer, whilst Shaun Evans (Endeavour) takes the mantle of John Sweeney.