Fan Casting Park Seok Kyu in Mr. Robot (Korean remake)

Seok Kyu is the widowed warden of the prison Min Joon is an inmate in. Seok Kyu at first seems like a kind and friendly man who bonds with Min Joon and tries to be his father figure. But once Min Joon finds out about his dark web business and decides to report it to the NIS, Seok Kyu has his guards and inmates beat up Min Joon nearly to death and lock him up in the basement to be used as a tool. But later, Seok Kyu eventually grovels to Min Joon and instead lets him free once Min Joon tells him the NIS and police will come to arrest Seok Kyu, with the latter thanking Min Joon for being his "saviour".