It’s Halloween and the Five-0 team has a serial killer on their hands. It was a race against time to catch him before he claimed anymore victims.

In the meantime the blood bank was robbed and the thieves stole blood, but not by picky vampires as it would appear. Jerry was there to watch it all go down and call for help. Danny had a tough job being a parent tonight.

Grace decided to lie to her mother about where she was going. It was up to Danny to go track her down and bring her home safely. But not without a creepy walk to a phone first after they have a tire blow out. Danny and the adorable Charlie get to spend their first Halloween together by trick or treating in the hospital.