A.J. Cook will return to Criminal Minds for one episode, a source tells TVGuide.com.
Cook, 32, is due back on the set this week to reprise her role as agent and media liaison Jennifer "JJ" Jareau for Paget Brewster's final episode.
"Heading back to Criminal Minds for @pagetpaget final episode," she tweeted Tuesday. "@GUBLERNATION [Matthew Gray Gubler] is directing. It's going to be GOOD/WEIRD/SAD!!!"
The actress, who was dropped from the ...