MacGregor Arney in "Curious Incident" at Mixed Blood. /Rich Ryan

Audiences have seven more chances to watch a young Englishman investigate "The Curious Incident of the Dog in the Night-time" at Mixed Blood Theatre. A week has been added to the run of the drama, based on the Mark Haddon bestseller about Christopher, whose autism affects how he sees the world and how he goes about solving the killing of a neighbor's dog. Directed by Mixed Blood founder Jack Reuler and featuring a remarkably diverse cast, "Curious Incident" offers tickets at two price levels: They can be reserved in advance for $25 at 612-338-6131 or mixedblood.com. Or free tickets are available, on a first-come/first-served basis, before each performance through Dec. 10.