Did you stop answering the phone at 9.00 P.M. on Sunday nights to watch the original Upstairs, Downstairs ? Did you gather at the water cooler or its electronic equivalent to discuss last night's tragic events on Downton Abbey ? Did you tweet our sister with delight and amazement when Sherlock jumped off the roof, splattered himself on the sidewalk, and then showed up behind a tree at his own grave site? As Rebecca Eaton, executive producer of the...