Steven Weber's FBI Agent Mike Faber returned to 'In Plain Sight' (Wed., 10PM ET on USA) for the season 3 finale -- in a most unexpected way.

[Spoiler alert.]

As Mary settles into a hotel room in Mexico, she flirts with the cute room-service guy. He asks, "May I interest you in a drink before dinner -- champagne or a sex on the beach?" She's intrigued by the innuendo but replies, "Get back to me when you've taken your SATs." She looks him up and down.

As he leaves, Faber walks out of the bathroom in a towel. He chides her for flirting with the "cabana boy" and picks up the bottle of wine, saying, "I think this has had enough time to breathe, don't you?"

"I can't believe I'm in Mexico with a guy who lets his drinks breathe." Neither can we.