Michael Ausiello at TV Guide is reporting a big scoop: NCIS star Mark Harmon is threatening to walk off the hit CBS show.

Citing inside sources, Ausiello says that Harmon has always been fed up with producer Donald Bellisario's (Magnum, P.I., JAG, Quantum Leap) "chaotic management style" and wants off the show. The source also says that Harmon is one of the nicest guys on television and that he's in the right on this one. The dispute is described as "a big standoff."

So I'll ask you readers the same thing that Ausiello asks his readers: can NCIS survive without Mark Harmon, or is he the main reason to watch the show?

[via TV Tattle]