The Quiet Diplomat centers on former UN Secretary General Ban Ki-moon. The UN saved his life during the Korea War, inspiring him to become a man of peace. During two terms as the 8th Secretary General, Ban discovers the challenges of international diplomacy in an increasingly splintered world.
| Actor | Role |
|---|---|
 Ban Ki-moonSelf | Self |
| YYoo Soon-taekSelf | Self |
| JJuan Manuel SantosSelf | Self |
 Mark Malloch-BrownSelf | Self |
| BBeatrice LindstromSelf | Self |
 Richard HaassSelf | Self |
| RRajan MenonSelf | Self |
| JJean KrasnoSelf | Self |
| LLina KhatibSelf | Self |
| RRichard GowanSelf | Self |