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NCIS season 23, episode 12 preview: 'In too deep'

NCIS Season 23, Episode 12 'In Too Deep' promises an exploration of McGee's past... and what's happening with Jessica and Jimmy?

McGee is 'In Too Deep' during 'NCIS' episode dealing with past love

Timothy McGee (Sean Murray) takes on a "NCIS" case that might change his life with "In Too Deep," airing on March 17 (CBS).