Charlie and Nolan compete for the attention of a hot grad student. Martin and Ed do a patriotic sham.
Nate Getz asks the NCIS team for help when the FBI looks at an ex-Marine alleged to have made a chemical bomb.
The team investigates murders that have a religious undertone to them.
Dexter faces a serial killer from his past; Debra has problems with her new position and Travis with Gellar think of their next move.
In order to solve the mysterious murders, Homicide asks for the help of Brother Sam, who Dexter knows used to be a serial killer. Debra has two proposals, one personal and one job-related.moreless
Dexter uses his 20 year high school reunion as a chance to hunt the prom king. It's going fine until he is called to the scene of a vicious faith-based murder leaving him with questions about what he wants to pass on to Harrison. Debra who is finally in a good place with her relationship with Quinn and her job becomes an unexpected hero.
Claire decides to take on one of the villains herself, but she may not be as invulnerable as she believes. Nathan and Tracy search for the truth about their origins. Maya makes a shocking discovery. Hiro and Ando look for help in the most unlikely places.moreless