Todd Boyce has said that his character Stephen is starting to come to the realisation that he will need to kill his fiancée Elaine (Paula Wilcox) in Coronation Street.
When Carla (Alison King) reveals that she is planning to sell her half of Underworld, Stephen is desperate to get hold of it and asks Elaine if they can remortgage their new home to raise the funds.
Elaine flat out refuses to entertain the idea, however, and in next week's episodes Stephen sets a plan in motion to bump her off and get hold of the money.
"The walls are closing in on him," said Boyce. "He is not going to be able to persuade Elaine to invest in the factory - that is the first route he takes but she is having none of it.
"Once that route is not an option he is starting to think he will have to kill her now to get the insurance money."
The first plan is to switch out her blood pressure tablets and spike her drink with caffeine pills.
"He wants to set up the idea that her health is failing," explained Boyce. "It is a knee-jerk reaction. Leo's and Teddy's deaths were in moments of panic. Rufus had him on the ropes, he was fighting for survival. This is the same, he is running out of options and panic sets in.
"He gives her the tablets and then he acts as the concerned partner, despite knowing that he is the one that has made her feel so ill and dizzy. He plays the part perfectly.
"He isn't planning to kill her at that point. He is trying to destabilise her. He offers to go out and get her some food and leaves her in the flat but when he comes back she has fallen."
He continued: "He is genuinely shocked and there is a moment when it looks like her is going to revive her. But then you can see the cogs turning and he thinks 'let's see how this turns out and maybe it might be the perfect ending!'
"He leaves, crossing his fingers that she will die before she is discovered."
Coronation Street continues Mondays, Wednesdays and Fridays at 8pm on ITV1 and ITVX.