It's Christmas in Hawaii, and McGarrett is trying to convince Danny to steal a tree.

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Yes, it looks like the cops are getting into the Christmas spirit by committing a burglary during "Ke Koho Mamao Aku (Longshot)."

Why? Well, that remains unclear, but knowing Danny (Scott Caan), it probably has to deal with him not wanting to deal with a tree's massive price tag. What is clear, however, is that Five-0 will make a trip to the big island to investigate the murder of a cowboy. While they are there, the team will find themselves on the slopes of Mona Loa.

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Along with the casting of an astronaut, set photos from Masi Oka (Max) indicate that the episode will take on an otherworldly quality. The rocky, desolate setting looks like a perfect place for scientists to test a Mars rover, and Oka's photos show just that (see above).

In the meantime, Max will have to work with a rival medical examiner. Let's see who cracks the case first.

Find out more when Hawaii Five-0 airs its Christmas episode on Dec. 12 at 9 p.m. ET on CBS. Click the video below to see a preview for the series' latest episode.