Season 1 (2018)
8.20 avg 32 episodes 8.5 → 8.4 29 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Witness | 8.5 | 37 |
| 2 | Bon Asks Ae Rin Who She Is | 8.0 | 27 |
| 3 | Ae Rin Hears That Her Children Went Missing | 8.0 | 25 |
| 4 | Bon Enters Ae Rin's Life | 8.0 | 24 |
| 5 | Bon the Babysitter | 8.0 | 25 |
| 6 | Bugged | 7.9 | 23 |
| 7 | What Happened in Poland | 8.0 | 24 |
| 8 | Ae Rin and the Secret Room | 8.0 | 23 |
| 9 | I'll Tell You Everything You Want | 8.1 | 23 |
| 10 | Am I Hired? | 8.2 | 28 |
| 11 | The Bon Identity | 8.2 | 23 |
| 12 | Who Are You? | 8.2 | 24 |
| 13 | Exposed | 8.3 | 23 |
| 14 | Jin Yong Tae Is the Key | 8.2 | 22 |
| 15 | The Fugitive | 8.3 | 22 |
| 16 | I Will Protect You No Matter What | 8.3 | 22 |
| 17 | You Talk Too Much for a Spy and Traitor | 8.1 | 20 |
| 18 | Where Could He Be Hiding? | 8.0 | 20 |
| 19 | CornerStone Mars | 8.2 | 20 |
| 20 | Secret Conversation | 8.2 | 20 |
| 21 | Biochemical Bomb | 8.2 | 21 |
| 22 | Death Protocol | 8.6 | 20 |
| 23 | I Will Crush CornerStone | 8.1 | 21 |
| 24 | A Blue Night in Jeju | 8.3 | 21 |
| 25 | Mission Impossible I | 8.3 | 21 |
| 26 | We Need to Infiltrate His House | 8.3 | 21 |
| 27 | Mission Impossible II | 8.3 | 20 |
| 28 | The Final Opportunity | 8.5 | 19 |
| 29 | Spy | 8.2 | 19 |
| 30 | Ji Yeon Is in Danger | 8.3 | 19 |
| 31 | New King's Bag | 8.3 | 19 |
| 32 | A Handsome Man's Cafe | 8.4 | 24 |