As a string of break in assaults grows more violent, the cops investigate an online incel group to identify a suspect.
The CSI team investigates a popular spiritual retreat when a body is found floating in a mud bath. Meanwhile, Hodges questions his marriage plans to Elisabetta. Catrinel Menghia Marlon guest stars. (TV-14 D, V)
Henry reaches out to his only ally within Langley - Calder. Meanwhile, Joan reveals something during her deposition that puts a wedge between herself and Arthur.
When a young woman's body is found in Central Park, drained of blood and missing part of her ear, the CSIs jumpstart an investigation that takes them into the dark and mysterious subculture of vampirism. (TV-14)
