After the dangerous offensive launched on the embassy office in Saigon, Tư Chung and his comrades have to find ways to adapt to rising suspicions from the CIA advisors, as well as dealing with violent repercussions involving someone very dear to him. The third part of a series based on a real-life organization involved in intelligence activities in South Vietnam before 1975.
| Actor | Role |
|---|---|
 Quang TháiTư Chung / Hoàng Sơn / F8 | Tư Chung / Hoàng Sơn / F8 |
 Hà XuyênNgọc Mai / Z20 | Ngọc Mai / Z20 |
 Thúy AnNgọc Lan / H3 | Ngọc Lan / H3 |
 Thanh LoanHuyền Trang / Z1 | Huyền Trang / Z1 |
 Bùi CườngNăm Hòa / K9 | Năm Hòa / K9 |
 Hồng PhúcMajor Đặng Văn Sông (Director of RVNP) | Major Đặng Văn Sông (Director of RVNP) |
 Hoàng SơnMajor Trần Phiệt (Deputy Director of RVNP) | Major Trần Phiệt (Deputy Director of RVNP) |
 Ali KhanLt Col. Cordel ("Coọc Đen") | Lt Col. Cordel ("Coọc Đen") |
 Robert HảiCol. Michael ("Mai Kơn") | Col. Michael ("Mai Kơn") |
 Hai NhấtBa Cẩn | Ba Cẩn |
 Khắc YênHai Hùng (Uncle Hai) | Hai Hùng (Uncle Hai) |
 Minh ĐángHai Đằng | Hai Đằng |
 Thanh TúDirector-General of Police Nguyễn Ngọc Liên | Director-General of Police Nguyễn Ngọc Liên |
 Kim ChiDirector-General's wife | Director-General's wife |