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The heat is on in Investigation 5, an undercover police unit specializing in thwarting violent crimes. Led by Superintendent Jang Moon Won, this team of young and elite officers, including Cha Gun Woo, Jang Min Joo, and Lee Won Jong, assume new identities and infiltrate dangerous crime syndicates. With only their wits and poker faces at their disposal, can the team complete their missions without blowing their covers in hostile territory?

Series Cast

  1. Yoon Soy

    Yoon Soy

    Yoo Min-joo

    16 Episodes

  2. Lee Won-Jong

    Lee Won-Jong

    Choi Tae-pyeong

    16 Episodes

  3. Park Sung-woong

    Park Sung-woong

    Jang Mu-won

    16 Episodes

  4. Kim Min-jun

    Kim Min-jun

    Teacher Jung

    16 Episodes

  5. Kim Bum

    Kim Bum

    Cha Gun-woo

    16 Episodes

Full Cast & Crew

Last Season

Season 1

2015 | 16 Episodes

Season 1 of Hidden Identity premiered on June 16, 2015.

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Hidden Identity
Hidden Identity


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Original Name 신분을 숨겨라

Status Ended


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Certification -

Type Scripted

Original Language Korean

Runtime 65m



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