Melinda McGraw Cast as Gibbs' Ex-Wife on NCIS

Melinda McGraw is coming to NCIS as Gibbs' ex-wife. The one who was also married to Tobias Fornell!

The actress, who played Don Draper mistress Bobbie Barrett on Mad Men, will guest star on the CBS procedural as Diane, the former Mrs. Leroy Jethro Gibbs, in the November episode, “Devil’s Triangle.”

The reason for her appearance? Diane's current husband somehow gets caught up in a joint NCIS-FBI investigation, thus involving our favorite federal agent odd couple of Gibbs and Fornell (Joe Spano).

Neither of the men are too high on her these days, given their respective divorces.

Gibbs definitely has a thing for redheads.

Gibbs may feel more positively about another new character. As fans probably know, Jamie Lee Curtis will be joining the show in November as well for a two-episode arc as Charlotte Ryan.

An official from the Office of the Inspector General at the Department of Defense, Ryan will spar with Gibbs, and that should lead to some “sparks,” according to executive producer Gary Glasberg.

“We’re expecting some real chemistry.”

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.