When two guards at a maximum security prison are murdered, the BAU team thinks one or more people within the prison walls may be responsible.
While Lisbon and the team look for the murderer of an unidentified victim, Jane hits rock bottom in a Las Vegas club.
Team Scorpion are blackmailed into breaking into the United Nations to help with the assassination of an arms dealer, while Sylvester tries to protect Megan's wishes.
The gang look for revenge following an attack at the compound, but nothing goes as planned. Clay continues to stand up to Toric.
Alex uses an unconventional treatment to save a dying patient. A Halloween-hating couple tests Iris’s limits.