You knew he’d be back. Nearly two years after the modern Sherlock Holmes seemed to leap to his death from a London hospital, the clever fellow has staged a resurrection with the city facing a possible terror attack. Season 3’s trio of new episodes kicks off with a bang of an explanation, followed by a brilliant reunion between Benedict Cumberbatch’s Holmes and Martin Freeman’s Dr. Watson. From there, it’s back to battling crime and mayhem. Sherlock’s former archenemy may be dead, but a new nemesis lurks. Sunday, Jan. 19, at 9:58 p.m., PBS; check local listings
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