Emily Nussbaum: “The Hour' and the seductive pleasures of formula.

Last year, “Downton Abbey' was everyone's pet British drama. The show rebranded PBS. It drove fashion trends. The indie comedian Patton Oswalt began live-tweeting the damn thing. I, too, was won over by the Titanic-era melodrama, calling it more cake than bread. When the . . . (Subscription required.)

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