NCIS‘ Leroy Jethro Gibbs (played by Mark Harmon) has seen a lot in his storied life — but what he’s about to lay his eyes on in next Tuesday’s episode of TV’s most watched drama is sure to be a first.

In the episode “Devil’s Trifecta” — which is a follow-up of sorts to last year’s “Devil’s Triangle” — this happens

For the precious few uninitiated of you out there, that is Gibbs’ ex-wife, Diane Sterling (played by returning guest star Melinda McGraw), getting spooned by Sean Murray‘s McGee. We can’t quite make out Gibbs’ expression from this angle, but dollars to donuts it is one-half bemusement, one-half “WTF?”

You’ll have to tune into CBS next Tuesday at 8/7c to find out exactly what transpired here. But suffice to say, as shared in the official synopsis for the episode, “Rumors run wild among the group after Diane stays overnight at McGee’s.” Yeah, I’d say so!

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