An old friend was back in town, but for how long?
On Criminal Minds Season 11 Episode 19, Prentiss returned (hooray!) to get help from her old friends at the BAU because she was tracking down an international serial killer.
The team member were quick to spring into action when word emerged that the next murder was going to take place on American soil.
With few leads, they found themselves searching in one place more than once, but was there something more sinister at play?
Use the video above to watch Criminal Minds online to get up to speed and to welcome back an old favorite.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.