The Walk-In continued with its second episode on ITV on Monday night, airing one scene that proved to be particularly difficult for viewers to watch.
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The five-part drama stars Stephen Graham as a real-life activist and reformed Neo-Nazi, Matthew Collins, working to stop the radicalisation of young white men before it begins.
WATCH: Are you watching the drama?
In the latest instalment, viewers watched as Matthew thought back to a violent attack on a library full of mothers that he was involved in.
The shocking scene saw the racist group launch a brutal attack on a group of peaceful women, many of whom were black and Asian.
Viewers took to Twitter to share their horror over the distressing scene, with one person writing: "#TheWalkIn is horrible to watch, the scene with the women was stomach churning," with another tweeting: "My god that scene in the library was stomach turning."
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A third commented: "I get that fight scenes in dramas are all choreographed but that was so realistic it was horrific. Frightening to think this is based on true events," while another added: "This is an incredibly hard watch."
© Photo: ITVViewers have praised the compelling and important drama
While many viewers were horrified by the scene, others also took to Twitter to praise the compelling episode as a whole.
One person wrote: "#TheWalkIn @StephenGraham73 Brilliant!! We chatted last week about it but this just gets better and grittier! A must watch @ITV," while another added: "Just goes to show the British TV industry can still make some of the world's best drama #thewalkin."
A number of fans also applauded Stephen Graham for his performance, hailing him as one of the "greatest actors" of our time. One person tweeted: "I think we need to start talking about @StephenGraham73 in the greatest actors of all time conversation," while another agreed, writing: "@StephenGraham73 is one of the greatest actors of our time. Brilliant #fact #TheWalkIn."
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