When a BAU member gets in trouble in Mexico, the team enlists the services of the International Response Team for their help.
The BAU is called after three victims are found tied to stakes in the Arizona desert.
Victoria has doubts about Emmet when a woman from his past shows up. Meanwhile, Melanie and Elka deal with an unwanted house guest.
Mayor Neil rolls out a new safety initiative as Arpi trains him for his most challenging task yet. Mikaela and Tommy realize the clock is ticking for them to find love.