How did Reid feel about his mother being used in a clinical study?
That was addressed on Criminal Minds Season 12 Episode 11 when it became clear there was something Reed did not like about the clinical study.
Meanwhile on this hit drama series, the team were shocked to find that a homeless man had a hieroglyph in his armpit.
The plot thickened when it emerged that it was the exact same as one found on a victim many years before.
Did the team manage to crack the case?
Use the video above to watch Criminal Minds online to get caught up with the latest developments for the characters.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.