Dexter's Masuka is back - only this time he's taken a turn to the dark side, appearing as the Unsub on Criminal Minds Season 10 Episode 2.

The BAU are called to Seatlle to investigate a pair of deaths. Only when they get there, they quickly realize there are more than two deaths, and all of them are different.

The Nine Circles of Hell in Dante's Inferno is the killer's M.O. - and each victim has something carved in the roof of his mouth.

Meanwhile, Garcia is having a rough time with nightmares, and feels the need to visit the man she shot in Reid's hospital room on Criminal Minds Season 9 Episode 24. Morgan strongly disagrees with her decision, and withdraws any support from her, to the point of ignoring her phone calls.

This is an important episode in the life of Garcia. Tune in to find out more by watching Criminal Minds online.