It's Halloween on Oahu, when Jerry and Max come out to play.
Yes, that's right, Max is back on Hawaii Five-0 Season 7 Episode 6. (Hopefully that doesn't mean the fill-in M.E. will totally disappear, but she probably will, just like the forensics guy who was crushing on Kono.) Max is refreshed, and newly wed, after his hiatus with Doctors Without Borders.
Even better, continuing his costumes depicting the reputed film legacy of Keanu Reeves, he's stylishly dressed up as John Wick this Halloween.
Max is back in fine form, spouting a mouthful of medical jargon until he finally dumbs it down for his colleagues.
Whatever it is that she saw, it literally scared her to death.Max
The case itself took a circuitous route back to where it started, with the innocuous medium's assistant, the only character left standing, as the culprit. Kind of a yawner as far as mystery goes.
But no one watches Hawaii Five-0 for complex mysteries. It's all about the relationships.
Take, for example, Uncle Jerry spending Halloween night with the Williams children. Jerry came up with a killer costume often again, this time as a decapitated man.
He and Charlie are having fun, elaborately carving pumpkins with Jerry's Halloween mix in the background. Meanwhile Grace pouts, since she's grounded after sneaking out last Halloween and getting caught in an adventure.
Jerry tries to get her to come trick-or-treating with he and Charlie, but she's not budging, despite his impassioned ode to Halloween. (She caves in the end.)
Jerry: You know why I love Halloween so much?
Grace: The chocolate? Just a guess.
Then there's poor Kono and Adam, who are on their way out of town when they get waylaid by a bloody woman and trapped by a masked cult. That's right, a death cult can afford Hawaiian real estate.
This storyline provides the action for this episode, as they save themselves and another hostage from a grisly end with an inventive variety of weapons.
These psychos had a thing for making their own horror movies every Halloween.Grover
Of course, there's the usual colorful McGarrett-and-Danny banter, which is why the show suffers during the 20 percent of the season when Scott Caan is off.
McGarrett tells a story about two cops going to a haunted house in 1940, which Danny says is BS. It turns out that it's the same house in which the medium was killed.
Max: Everybody on the island knows of the well-documented paranormal incident.
McGarrett: Everybody except for Detective Williams.
There was no sighting of Chin's niece, Abby, Duke, Kamekona or his equally large brother. It's the curse of a large cast. Your favorite supporting character won't be there every week.
Eric the forensic tech was there, skittishly explaining how his uncle Danny had terrified him when he first went trick-or-treating, and he ended up wetting his Pink Power Ranger outfit.
Eric: Not really, [Danny] just psychologically scarred me for life.
McGarrett: He has that effect on some people.
Next week, two other recurring characters return, as Catherine comes back to complicate McGarrett's nonexistent love life and to get him to rescue his spy mother Doris.
To freshen up on Doris and Catherine's roles in the series, watch Hawaii Five-0 online.
Who had your favorite costume? Are you glad to have Max back full time? Which characters will vanish next week to accommodate Catherine and Doris? Comment below.
Dale McGarrigle is a staff writer for TV Fanatic. Follow him on Twitter.