The Sister star Nina Toussaint-White had to work on the thriller from inside her wardrobe

While viewers of The Sister may find themselves watching from behind the sofa, one of its stars worked on the thriller from inside her wardrobe.

Nina Toussaint-White stars alongside Russell Tovey, Bertie Carvel and Amrita Acharia in the spooky four-parter directed by The Victim’s Niall MacCormick. While filming concluded last December, the actors’ voiceovers had to be completed in lockdown.

“I still had ADR [automated dialogue recording] to do, which is where you re-record some lines or add in an extra piece of dialogue,” explained Nina, who also featured in BBC hit Bodyguard as Rayburn.

“Usually we’d do it in a recording studio but I had to do it at home this time.

“I had to go into my wardrobe, which I’d covered with my duvet, and sit in there with a little light on and my headphones and microphone. It was very strange but it’s actually becoming quite normal now, which I suppose in itself is weird.”

Nina’s role as DCI Jacki Hadley in The Sister is integral to the plot.

“I play the best friend of the lead character Nathan’s wife, Holly, and I’m also investigating the disappearance of Holly’s sister. I hold this massive secret and the character is interwoven into a lot of the storylines.

“I’m a fan of detective dramas and they’re wonderfully-written pieces that grip the audience, but so many of them are the same, whereas this is very different.”

© ITV

The London actress, who also starred in recent Amazon Prime series The Feed and Channel 4 sitcom GameFace, as well as EastEnders and Emmerdale, says she had no idea Bodyguard would be the huge success it became.

“I knew because it was from Line Of Duty’s Jed Mercurio it would be good, but I had no idea it would receive the response it did,” she said. “I saw a two-minute clip while I was doing ADR on it and I thought it looked cheesy and wasn’t sure people would like it, but I hadn’t seen the finished product so I was very wrong.

“It had phenomenal writing and acting, but a lot of a show’s success is down to timing. It had been an amazing summer, there was the World Cup, and we were going into autumn where people were starting to hibernate and looking for something to watch.

“The Sister will be good, but maybe its timing, as many of us go into a second lockdown, will lead to even more people watching it.”

The Sister is on Mon-Thur, STV, 9pm