Shane Miyashiro

On Halloween, Magnum and Jin (guest star Bobby Lee) search for a skip-tracer at a Halloween bash, just as Katsumoto tracks an escaped killer who is headed to that same party. Also, Higgins and Rick must spend the night at an allegedly haunted house in order to debunk the notion, and TC and Kumu protect a sacred Hawaiian burial ground.

A case from 15 years ago forces Grover to take his family on the run when a dangerous mob boss tracks him down to seek revenge.

MacGarrett and Five-0 support Danny and Rachel (Claire van der Boom) by determining what happened when Grace (Teilor Grubbs) gets into a life-threatening car accident and lands in critical condition. Also, Tani helps Koa (Kunal Sharma) when his rehab patient goes missing.

Harry Langford (Chris Vance) helps Five-0 investigate a series of murders that follow the plot of a fabled unpublished crime novel from the 1920s. Also, Tani and Junior's friendship takes a meaningful new turn.

When an overenthusiastic neighborhood watch group asks Magnum and Higgins to investigate a shady character living on their block they are shocked to find that they may have inadvertently stumbled upon a serial killer on the loose. Also Jins new money laundering business leads him to want to help a new friend.