Is there a connection between the two women? And do they have anything to do with a cold case which Detective Sergeant Lachlan McKenzie (Peter O'Brien) is a little obsessed with, where another young woman was killed in the same location eight years ago.
Of course plenty of the drama stems from the detectives, as we learn about what makes Winter cool and detached, and how are her professional imperatives and motivations linked to her personal life?
"I've always held up Helen Mirren's character Jane Tennison in Prime Suspect, I always found her character incredibly intriguing and very complex, and I just wanted to make sure that Eve was given a mysterious aspect. While this woman is independent and strong and forging ahead in a predominantly male environment, she also has to be flawed and have vulnerabilities and weaknesses, so it was important to create a rounded individual."
The fact that Gibney is again playing opposite her long-time friend and past co-star Peter O'Brien, who was also her love interest in Halifax FP, just makes their on-screen rapport even stronger.
"He and I are great mates, and we've known each other an awfully long time - he doesn't like being reminded how long it's been. But of course it means we have a shorthand, and it was very easy stepping back into those roles, and it's always great to work with him because we can be very open and honest with each other. We've got a great trust."
The cast is rounded out by rising detectives Alesia Taylor, played by Antonia Prebble, and Milo Lee, played by Akos Armont, as well as Matt Nable playing vetern federal agent Jake Harris - an unco-operative, cynical chap, unwilling to play ball with Winter.
When: Sunday, 8.30pm
Where: TV One
What: Broadchurch in Sydney
