Happy Valley star Charlie Murphy said returning for the third season of the show was like "opening a time capsule".
The actress, 34, played Ann Gallagher - a kidnap victim who later becomes a Police Community Support Officer.
Season two of the popular crime drama aired in 2016 and the third and final season didn't return until the beginning of 2023.
While appearing on This Morning to promote her and Richard Armitage's new Netflix show, Obsession, Charlie discussed the third series of Happy Valley.
"Such a great thing [to be part of] and to come back to it after seven years as well," a newly-blonde Charlie said. "And we always knew we would after series two."
Charlie continued: "It's like opening a time capsule like seeing everyone on set again.
"Some people have had kids some people are with different people, you know, you just catching up all the time.
"I just remember when the cameras were rolling... They were like, 'you have to stop talking about your private life. It's rolling. You have to start'."
The closing scenes of Sally Wainwright’s epic West Yorkshire trilogy series aired to instant acclaim earlier this year after viewers had been gripped for weeks.
Sergeant Catherine’s story came to an end in a nerve-jangling extended finale, which offered a satisfying ending for many longtime fans of the show after dramatic scenes.
The BBC drama concluded with Catherine confronting the rapist and murderer as Tommy set fire to himself while the lovable policewoman walked away.
The creator of the series, Sally, recently opened up about the future of Catherine she discussed whether the finale would do the series justice.
Speaking on Newsnight, Sally said: "I tend not to very get nervous anymore really, I'm kinda philosophical that it is what it is and people will respond how they respond."
"But I think because it appeared to be doing very well I was worried it might fall at the final hurdle and people might think it was a disappointing ending in some way but I kinda knew it wasn't. I knew it was what I wanted it to be," she continued.
"It was satisfying. I had a real choice about whether to end on a pessimistic note or an optimistic one.
"Which one of them was gonna survive but it was a no brainer to end on an optimistic note with someone like Catherine. She's such a force for good."
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