Viewers of the ITV drama, Until I Kill You, were captivated by the second episode, but quickly noticed an error that left them shocked.
In the latest episode, audiences watched the chilling story unfold as Delia met carpenter John in a Camden pub back in 1991.
Initially, he appeared to be a caring partner, showering Delia with flowers and affection. However, it soon became apparent that this was all a facade, revealing him to be a man capable of extreme violence.
During Monday's segment of the four-part series, which is based on the real-life story of Delia Balmer and murderer John Sweeney, events took a horrifying turn as John brutally assaulted Delia.
Read more on manchestereveningnews.co.uk