Shane Miyashiro

Grover is forced to take his family on the run when a dangerous mob boss seeks revenge for an old case dating back 15 years.

Harry Langford (Chris Vance) helps Five-0 investigate a series of murders that follow the plot of a fabled unpublished crime novel from the 1920s.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.

McGarrett and the team support Danny and Rachel by determining what happened when Grace gets into a life-threatening car accident. Tani helps Koa when his rehab patient goes missing.

On Halloween, Magnum and Jin search for a skip tracer at a Halloween party, while Katsumoto tracks an escaped killer who is headed to that same party. Higgins and Rick must spend the night at an allegedly haunted house in order to debunk it.

When an overenthusiastic neighbourhood 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.