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Mark Harmon to appear in every episode of 'NCIS: Origins'
ET says Harmon reflected on the early days of 'NCIS' ahead of the show's October 6 CBS premiere.
TLDR
ET says Mark Harmon reflected on the early days of 'NCIS' in a Then & Now feature. It said he would appear in every episode of 'NCIS: Origins,' which was set to premiere on CBS on October 6, 2026.
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