ITV's Until I Kill You: The real life story of Delia Balmer behind the TV drama

dailyrecord.co.uk:

New ITV drama Until I Kill You tells the harrowing real-life story of Delia Balmer. Set in 1991, the series follows London-based agency nurse Delia Balmer (Anna Maxwell Martin), who initially believes she has found a true romantic connection with John Sweeney (Shaun Evans), a 'fellow free spirit.' After meeting in a Camden pub, Delia feels she shares a bond with Sweeney, a carpenter and casual laborer who also loves travelling.

Liverpool-born Sweeney seems like the perfect boyfriend, often bringing Delia flowers. However, she soon discovers he is a dangerous killer who will one day turn his rage on her, reports the Mirror.

In her 2017 book Living With a Serial Killer, which informed the series, Delia reflected on his manipulative behavior: "Subtle changes happened slowly.

I should've known something was wrong, but I am too soft and trusting. I'd never encountered anything like it before." Sweeney, who was squatting, eventually moved into Delia's home.