The M&A team mobilizes to trace the last steps of 21-year-old Satcha Moncado before she disappeared, knowing her undocumented status makes her more vulnerable.

Their search uncovers a greater threat that nearly claims the life of one of our own.

Air Date: Tuesday, October 31 (10:00PM – 11:00PM) on NBC.

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FOUND -- "Missing While Undocumented" Episode 105 -- Pictured: Mark-Paul Gosselaar as Sir -- (Photo by: Steve Swisher/NBC)