Kelli Giddish

The Law & Order: SVU faces a new slew of challenges on Wednesday's episode (10/9c, NBC) when a boy from a gypsy community disappears and the community refuses to trust, let alone help, the police.

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Among those skeptical about the squad's investigation is the character played by Mark Margolis. "He's the head man in a gypsy community," he says. "In this case, he's the representative of the gypsy king here in this community — the gypsy king being in Hungary."

Watch a behind-the-scenes video: