Matthew Gilbert’s notes on Thanksgiving Day’s TV offerings, including “Punkin Chunkin 2012” at 8 p.m. on Science; “Michael Jackson: Bad 25” at 9:30 p.m. on Channel 5; a James Bond movie marathon from noon to Saturday at 5:30 a.m. on Syfy; an “NCIS” marathon from 6 a.m. to 6 p.m. on Friday on USA; and the Macy’s Thanksgiving Day Parade at 9 p.m. on Channel 7.
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