Royal Secret Agent - Season 1 Episode 5
- Genre: Comedy, Mystery, Drama
- Studio: KBS2
- Keyword: corruption, secret agent, inspector, historical, sibling, undercover operation, hidden identity, fight for justice, joseon dynasty
- Cast: L, Kwon Na-ra, Lee Yi-kyung, Lee Tae-hwan, Jo Soo-min, Ahn Nae-sang