By Ray Rahman
Updated September 03, 2015 at 12:00 PM EDT
Neil Genower/Buffalo Pictures and MASTERPIECE

Sir Arthur Conan Doyle (Martin Clunes) is bored. Not just that, the famed Sherlock Holmes author is a depressed mess: His wife has died, and so has his spirit. That is, until a real-life case involving a possibly framed half-Indian solicitor named George (Arsher Ali) grabs his attention—and ours. Based on true events (plus a Julian Barnes novel), Arthur is a gripping, even frightful detective tale that depicts a nation’s many social hang-ups. Clunes and Ali are great, but watch for Downton Abbey vet Charles Edwards to steal scenes as Doyle’s secretary Alfred Wood. B+