From left, Allen Leech as Tom Branson, Tom Cullen as Lord Gillingham, and Michelle Dockery as Lady Mary, in a scene from season 5 of "Downton Abbey." (The Associated Press)
The Irish-born actor employs his native brogue in portraying Tom Branson, the former chauffeur who's become a landed-family insider on the PBS series that returned Sunday for its fifth season. But moviegoers hear a Scotch lilt from Leech's World War II code breaker in "The Imitation Game."
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