It was the most talked-about drama series of last year - but Suranne Jones has admitted that she was "reticent" to return to Doctor Foster.
The award-winning actress told TV Times that writer Mike Bartlett had to convince her to reprise the role of wronged wife Gemma.
"Our writer Mike Bartlett said he didn't want to end it where he had stopped," she explained. "He wanted to look at how their lives would be affected by the drama of what had happened, but I was a bit reticent at first."
The first series of Doctor Foster followed Jones's character as she became suspicious that her husband Simon (Bertie Carvel) was having an affair - with her suspicions eventually being confirmed.
An overnight audience of almost 8m tuned in to watch the final episode, which saw Gemma confront her cheating spouse.
"It was so successful - I just wondered what the hook would be to keep people coming back to this relationship," Jones said.
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"Then I went out for dinner with Mike and the team and they told me what they had planned. I thought it sounded great - and actually like something we haven't explored in a couple before - so I said yes."
Series two of Doctor Foster will start shooting in September - with Jones confirming that "most of the original cast will return" and calling the new episodes "a continuation of Gemma and Simon's story, but it's a different stage in their life".
Suranne Jones: 'I hope Doctor Foster didn't cause any divorces!'
Watch the intense trailer for Doctor Foster's series one finale below:
