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    Critic’s corner: What’s on TV this weekend

    “Last Tango in Halifax”
    Matt Squire
    “Last Tango in Halifax”

    Last Tango in Halifax Sunday, 8 p.m., WGBH

    As old flames who reconnect on Facebook after the deaths of their spouses, veteran British actors Derek Jacobi and Anne Reid are thrilled to be representing the hope for a new spark late in life. Chatting with reporters at the recent Television Critics Association press tour Jacobi said, “One of the great joys of this particular drama is that the bedrock of the drama is a love affair between two older people. Actually, the age is not stressed. It is a love affair between two people who happen to be in their 70s.”

    Ray Donovan Sunday, 10 p.m., Showtime


    So James Woods (pictured) has popped up as a Whitey Bulger-like figure named “Sully” — a little too on the nose, that — complete with a girlfriend with a little dog. Will Ray’s plan to have Sully do his dirty work work? While the storytelling on this show has been uneven (not to mention the Boston accents), the performances of several actors including lead Liev Schreiber and Eddie Marsan continue to captivate.

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    Sex in America Saturday, 8 p.m., Discovery Health

    With apologies to Charlie Rich, we’ll find out what goes on behind closed doors.

    Mythbusters Saturday, 9 p.m., Science

    Exploring Hollywood myths. (Like fame making people happy, perhaps?)


    Saturday Night Live Saturday, 11:30 p.m., NBC

    A rerun worth checking out as Bruno Mars does a bang-up job as both host and musical guest.