Tom Arnold

Mixing Tom Arnold and Girl Scouts can't be a good thing, but CBS's Hawaii Five-0 is still giving it a whirl.

Executive producer Peter Lenkov tells me exclusively that Roseanne's ex will appear as the villain in this season's ninth episode. "Danny and McGarrett go on a Girl Scout outing and come face to face with Tom," teases Lenkov.

The big question of course is why the detectives are even on this Girl Scout trip. Per Lenkov, "Danny's daughter is a Girl Scout and he invites McGarrett to come along to teach the girls survival skills out in the wild."

But can any amount of skill training really ever prepare one for a wild Tom Arnold encounter?

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