“doctor who” (9 p.m., bbc america): “Doctor Who,” last year’s most

“doctor who” (9 p.m., bbc america): “Doctor Who,” last year’s most popular show on iTunes, returns to kick off what should be an exciting run of five new episodes. The opener finds the good Doctor (Matt Smith) forced into an impossible mission — to a place even the Daleks are too terrified to enter ... the Asylum.

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