Innocence

Harm and Mac must don their diplomatic hats when they're dispatched to Tokyo to represent an ensign accused of raping a young Japanese girl. Once the trial begins, the disparities between Japanese and American courtroom procedures put Harm at odds with the ensign's Japanese defense attorney, in turn putting US/Japanese relations at an all-time low.
When what began as the trial of an ensign turns into a trial of the United States Navy, Harm and Mac realize that in order to defend the ensign from life in a Japanese prison, they must actually solve the rape case on foreign soil.

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S04E04 - Going After Francesca