# Kim You-jung's Spy Role in '100 Days of Lie' Pushes Ratings to a Series High

- URL: https://unnienote.app/en/news/kim-you-jung-spy-role-100-days-lie-1dc122
- Published: 2026-10-22T13:54:25.329Z
- Publisher: Unnie Note

> Kim You-jung plays a spy in tvN's colonial-era drama '100 Days of Lie', and episode 4 set a series-high rating, according to Nielsen Korea.

## Key points

1. Episode 4 aired on October 18 and averaged 9.0% nationwide.
2. Nationwide peak was 9.8%, a series record, per Nielsen Korea.
3. Seoul metro households saw a peak of 10.6%.

## Who does Kim You-jung play in 100 Days of Lie?

Kim You-jung plays Lee Ga-kyung, a spy who infiltrates the Guk-guk resistance group in colonial-era Korea. The character works undercover in enemy territory to support the independence movement.

## What happened in episode 4?

Episode 4, which aired October 18, showed Lee Ga-kyung taking part in a plot to assassinate Sato Shin-ichi, a key Japanese figure played by Jin Seon-kyu. She was tested by a kidnapping staged by Yoo Pil-lip, and after doubts about her loyalty she was persuaded by Yoo So-ran to stay on the mission.

## How are the ratings doing?

According to Nielsen Korea, episode 4 averaged 9.0% nationwide and peaked at 9.8%, a series high. Among paying-platform households in the Seoul metro area, it averaged 9.8% and peaked at 10.6%.

| Region | Average | Peak |
|---|---|---|
| Nationwide | 9.0% | 9.8% |
| Seoul metro (paying platforms) | 9.8% | 10.6% |

## For international fans

The drama marks tvN's 20th anniversary special and runs 16 episodes. It is set during Japanese colonial rule, so viewers unfamiliar with that history may find the context helpful. Check tvN or local streaming services for current availability in your region.

## FAQ

### Is 100 Days of Lie a 16-episode series?

Yes. It is a 16-episode drama that premiered on tvN on October 10 as part of the network's 20th anniversary special lineup.

### Who is the main cast of 100 Days of Lie?

The main cast includes Kim You-jung, J.Y. Park, Kim Hyun-joo, Lee Moo-saeng, and Jin Seon-kyu.

### What is the drama about?

It follows people who infiltrate enemy territory during Japanese colonial rule to support Korea's independence movement.

## Sources

- [Xportsnews](https://www.xportsnews.com/article/2208999)

_Written and translated with AI from official announcements and Korean media reports. If something is wrong, please let us know._