Actor On Joo Wan has stepped down from KBS 2TV's 'Masked Prosecutor' for health reasons and has been replaced by Uhm Ki Joon.

On Joo Wan's agency, Will Entertainment, revealed recently, "Due to health reasons, On Joo Wan will unfortunately be stepping down from 'Masked Prosecutor.' �He is suffering from extreme dizziness due to intense fatigue, so he will be taking about a month-long break to regain stability, leading to this regrettable choice."

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He was supposed to be playing Kang Hyun Wook, an elite prosecutor, but this will now be acted out by Uhm Ki Joon. �Meanwhile, 'Masked Prosecutor' has already finished filming the first two episodes and will air sometime this month!