TV star Martin Clunes left some viewers unconvinced when he attempted to master a Scottish accent in new drama Arthur And George.
The Doc Martin actor, 53, plays Sherlock Holmes creator Sir Arthur Conan Doyle in the three-part ITV series, which made its debut last night.
But his attempt at delivering the novelist's Edinburgh accent left some unimpressed, with many saying that his brogue kept changing in the new biopic.
Steve Oliver wrote: "Martin Clunes does a good Scottish accent, shame he forgot to do it in the first scene."
Matt Hill said: "Was going to ask what part of Scotland Martin Clunes's accent was meant to be from, but he keeps changing it!"
Shona Gibbs added: "Don't think I can stand Martin Clunes' Edinburgh accent any longer."
Mark Grainger wrote: "The biggest mystery in Arthur and George is where Martin Clunes' accent keeps wandering off to."
And Adam Cooke said: "Martin Clunes' Scottish accent is atrocious."
Others defended the star, with one viewer, tweeting as " perfecto_cheese" writing: " Not every Scot speaks like Billy Connolly!"
William Forbes wrote: "Really impressed with Martin Clunes' Edinburgh accent."
Annette Gordon added: "I thought Clunes pulled off a Scottish accent very well. Very subtle".
The comments came after the Men Behaving Badly star admitted that he was daunted by the role and that he used a dialect coach to work on his Edinburgh accent.
"Conan Doyle is a very famous Scotsman so I had to speak with an authentic Scottish accent," he previously said. "I was terrified at the thought of playing him."
Arthur And George is adapted from Julian Barnes' book and tells the story of the novelist's attempt to clear the name of George Edalji, who was wrongly convicted of a crime in the 1800s.