Ann Hu

The husband of a murdered Japanese tourist becomes a suspect.

When a neighbor's home gets broken into, Mike thinks his fists and a cabinet full of rifles are enough to keep a home intruder at bay. But Vanessa thinks otherwise and rallies the neighbors to start a Neighborhood Watch program. While Mike patrols the block, he gets wrapped up in some neighborhood gossip which gets him into hot water.

Mike feels let down when his daughters aren't into celebrating Halloween with him the way they used to. He decides that his two-year-old grandson, Boyd, can be his perfect trick or treat partner. But Kristin, Boyd's mother, adamantly tells him that she doesn't want her son to go out on Halloween. Mike sneaks him out -- with a plan to get the child home before Kristin gets back from work. When Mike, dressed as John Wayne from "The Green Berets," gets to Ed's house with Boyd, they are greeted at the door by Ed's lady friend, Elvira (guest star Cassandra Peterson).

Sloane is adamant that the man who held her hostage in Afghanistan is still alive; Vance and Gibbs fear Sloane is willing to risk everything to destroy this man.

When a civilian scientist working with the marines is killed, and her advanced radar technology stolen, the NCIS team must scramble to find the missing technology and the culprit.