A.J. Cook will return to Criminal Minds for one episode, a source tells TVGuide.com.
Check out photos of A.J. Cook
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 procedural last summer for "creative reasons," exited in this season's second episode, as JJ was poached by the Defense Department.
It's unclear under what circumstances JJ is returning to the BAU. Brewster's exit arc kicked off last week when she was informed that a criminal she put away during her days with Interpol had escaped.
Brewster was demoted to appear in 17 out of 22 episodes this season and had the option
to remain as a regular.
Criminal Minds: The top 8 JJ moments
Since Cook's departure, Minds
has promoted recurring guest star Rachel Nichols
to series regular.
Cook, meanwhile, has guest-starred on Law & Order: Special Victims Unit
opposite Jeremy Irons
and filmed a TV movie with Jennifer Morrison
Are you glad JJ's coming back?