Did the team manage to crack their most difficult case yet?
That was addressed on Criminal Minds Season 12 Episode 12 when male bodies were turning up with no way to identify them.
This sent the team on a wild goose chase as they tried to find links between previous murders.
Did a shocking blast from the past hold the key to finding out the truth?
Use the video above to watch Criminal Minds online to get caught up with the latest developments for the characters.
You don't want to miss all the drama.
Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.