Crossword clues for the word: MARKHARMON The word MARKHARMON has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for MARKHARMON Showing 1 to 5 of 5 results Clue(s) "Gospel-spreading ""Chicago Hope"" actor?" "Gospel-spreading ""NCIS"" actor?" "NCIS" actor who played Dr. Robert Caldwell on "St. Elsewhere": 2 wds. Former "Chicago Hope" actor who plays agent Gibbs on "NCIS" (2 wds.) Leroy Jethro Gibbs portrayer on "NCIS"