Criminal Minds star Matthew Gray Gubler shares his thoughts on his character Spencer Reid's highly-anticipated return to the franchise after 5 years.

His return had been teased months earlier without giving away the tragic context, and according to A.J. Cook, she was the one who reached out to her former co-star to see if he could come back after conversations with showrunner Erica Messer. On the subject of what it was like to be back on set with Gubler, Cook told EW:

Here is everything you need to know about Season 18 of 'Criminal Minds: Evolution' including what the future holds for Will LaMontagne Jr. and Spencer Reid.