NO HARMON-Y FOR 'NCIS' COLE

Bid to replace Mark & bond with cast sinks

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HAPLESS Gary Cole is fighting a losing battle on "NCIS" to replace former top dog Mark Harmon in the eyes of backbiting castmates and the hearts of the show's disappointed fans, sources snitch.

"Gary's been desperate to fill Mark's shoes and fit in with the other series regulars, and it's kind of pitiful," spills an insider.

"On set, he tries to impress everyone by doing voices from the animated series he's done. He brings puzzles to share, and people are bracing for more annoying behavior even before season 20 gets underway."