Halloween comes early on NCIS next week.

It also comes full of murder, as a marine turns up dead after a practical joke goes horribly wrong. Watch the official CBS trailer for "Code of Conduct" below:

[video url="http://www.tvfanatic.com/videos/code-of-conduct-preview/" title="Code of Conduct Preview"] [/video]

As always, TV Fanatic will publish a detailed recap of events from the episode soon after it airs, complete with the latest NCIS quotes and pics from the hour.

In the meantime, click on the photos below to enlarge still images from the episode:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.