# My Secret Terrius

My Secret Terrius (Korean: 내 뒤에 테리우스; RR: Nae Dwie Teriuseu) is a 2018 South Korean television series starring So Ji-sub, Jung In-sun, Son Ho-jun and Im Se-mi. It was aired on MBC from September 27 to November 15, 2018 on Wednesdays and Thursdays at 21:55 (KST).

## Synopsis

A woman named Go Ae-rin (Jung In-sun) loses her husband. Along with her neighbour Kim Bon (So Ji-sub), who was an NIS agent, they discover the truth behind her husband's involvement in a huge conspiracy.

## Cast
### Main

* So Ji-sub as Kim Bon (Terrius)
    A legendary black ops agent at the National Intelligence Service (NIS).
* Jung In-sun as Go Ae-rin (Alice)
    A single mother who finds herself getting caught up in solving a conspiracy with Kim Bon.
* Son Ho-jun as Jin Young-tae
    A former con man who holds the key to a mysterious incident that Go Ae-rin and Kim Bon are involved in.
* Im Se-mi as Yoo Ji-yeon
    An NIS agent who is cold on the outside, but warm to Kim Bon, whom she has feelings for.

### Supporting
#### NIS agent

* Um Hyo-sup as Shim Woo-cheol
    Head of the NIS who values patriotism, loyalty and camaraderie.
* Seo Yi-sook as Kwon Yeong-sil
    Second-in-command and deputy director of the NIS. She is an ambitious, cold and calculating woman who hopes to take control of the agency, and who holds a secret about the conspiracy.
* Kim Sung-joo as Ra Do-woo/
    A genius hacker who is rebellious. He likes Yoo Ji-yeon.

#### KIS agent

Kingcastle is the housing complex where both Kim Bon and Go Ae-rin live. A closely bound community, it has a Kingcastle Information System (KIS).
* Kim Yeo-jin as Shim Eun-ha
    A woman with superb organizing and investigative skills, she is the chief of KIS.
* Jung Si-ah as Bong Sun-mi
    A KIS agent who has a crush on Kim Bon.
* Kang Ki-young as Kim Sang-ryeol
    A househusband, the only male KIS agent in the team.

### Others

* Yang Dong-geun as Cha Jung-il
* Park Ji-hyun as Clara Choi
* Kim Gun-woo as Cha Jun-soo
* Ok Ye-rin as Cha Joon-hee
* Hwang Ji-ah as Jo Seo-hyun
* Lee Joo-won as Jo Seung-hyun
* Kim Dan-woo as Han Yoo-ra
* Oh Han-kyul as Kim Seung-gi
* Jasper Cho as K
* Lee Hyun-geol as Park Soo-il
* Kim Byeong-ok as Yoon Choon-sang
* Kim Ji-eun as Yong-tae's secretary
* Park Soon-cheon as Lee Ji-sook
* Mirosław Zbrojewicz as a following spy
* Mateusz Bąkowski (Polish pianist, teacher music)

### Special appearance

* Kim Myung-soo as Moon Sung-soo
    Head of the national security at the Blue House.
* Nam Gyu-ri as Choi Eun-kyung
    A nuclear physicist from North Korea, and Kim Bon's ex-girlfriend.
* Yoon Sang-hyun as Yoo Ji-sub (ep 17, 19 & 20)
    Obgyn surgeon, brother of Yoo Ji-yeon
* Lee Jun-hyeok
    a shaman (ep. 11)

## Production

* Lee Yoo-young and Yoo In-na were offered the female lead role but declined.
* The first script reading took place in late June, 2018 at MBC Broadcasting Station in Sangam, South Korea.

## Ratings

| Episodes | Episodes | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number | Episode number |
| Episodes | Episodes | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| | Ep.1-16 | 1.188 | 1.408 | 1.098 | 1.118 | 1.244 | 1.795 | 1.365 | 1.793 | 1.300 | 1.732 | 1.384 | 1.690 | 1.264 | 1.704 | 1.431 | 1.765 |
| | Ep.17-32 | 1.503 | 1.849 | 1.513 | 1.873 | 1.333 | 1.696 | 1.537 | 1.899 | 1.334 | 1.613 | 1.653 | 1.815 | 1.579 | 1.805 | 1.838 | 2.011 |
| Ep. | Original broadcast date | Average audience share | Average audience share | Average audience share |
| Ep. | Original broadcast date | TNmS | AGB Nielsen | AGB Nielsen |
| Ep. | Original broadcast date | Nationwide | Nationwide | Seoul |
| 1 | September 27, 2018 | 6.8% | 6.3% (18th) | 7.5% (11th) |
| 2 | September 27, 2018 | 8.4% | 7.6% (8th) | 8.7% (6th) |
| 3 | September 27, 2018 | 6.3% | 6.1% (20th) | 7.4% (12th) |
| 4 | September 27, 2018 | 5.8% | 6.1% (20th) | 7.2% (13th) |
| 5 | October 3, 2018 | 6.6% | 6.7% (17th) | 7.7% (10th) |
| 6 | October 3, 2018 | 8.4% | 9.1% (4th) | 10.2% (4th) |
| 7 | October 4, 2018 | 7.4% | 7.2% (12th) | 7.9% (10th) |
| 8 | October 4, 2018 | 9.3% | 9.5% (5th) | 10.6% (3rd) |
| 9 | October 10, 2018 | 7.3% | 6.9% (15th) | 7.6% (9th) |
| 10 | October 10, 2018 | 9.3% | 9.4% (5th) | 10.6% (3rd) |
| 11 | October 11, 2018 | 7.4% | 7.4% (12th) | 8.2% (9th) |
| 12 | October 11, 2018 | 9.1% | 8.8% (7th) | 9.9% (4th) |
| 13 | October 17, 2018 | 7.7% | 7.1% (11th) | 7.7% (9th) |
| 14 | October 17, 2018 | 9.2% | 9.5% (5th) | 9.8% (4th) |
| 15 | October 18, 2018 | 8.2% | 7.9% (13th) | 8.8% (8th) |
| 16 | October 18, 2018 | 9.3% | 9.5% (6th) | 10.7% (5th) |
| 17 | October 24, 2018 | 8.0% | 8.2% (8th) | 8.5% (8th) |
| 18 | October 24, 2018 | 9.8% | 10.0% (5th) | 10.6% (4th) |
| 19 | October 25, 2018 | 7.9% | 7.9% (10th) | 8.2% (8th) |
| 20 | October 25, 2018 | 9.2% | 9.7% (6th) | 10.2% (5th) |
| 21 | October 31, 2018 | 7.8% | 7.9% (12th) | 8.4% (9th) |
| 22 | October 31, 2018 | 9.3% | 9.7% (5th) | 10.1% (3rd) |
| 23 | November 1, 2018 | 8.8% | 8.5% (11th) | 9.0% (10th) |
| 24 | November 1, 2018 | 10.8% | 10.3% (6th) | 10.8% (4th) |
| 25 | November 7, 2018 | 7.6% | 7.2% (11th) | 7.5% (12th) |
| 26 | November 7, 2018 | 9.1% | 9.0% (7th) | 9.7% (5th) |
| 27 | November 8, 2018 | — | 8.6% (12th) | 8.9% (11th) |
| 28 | November 8, 2018 | 10.4% | 9.8% (7th) | 10.4% (4th) |
| 29 | November 14, 2018 | 8.8% | 8.7% (9th) | 9.7% (6th) |
| 30 | November 14, 2018 | 10.5% | 10.1% (6th) | 11.1% (4th) |
| 31 | November 15, 2018 | 9.5% | 9.8% (7th) | 10.5% (6th) |
| 32 | November 15, 2018 | 10.6% | 10.5% (5th) | 11.0% (5th) |
| Average | Average | — | 8.55% | 9.22% |

## Awards and nominations

| Year | Award | Category | Nominee | Result |
| 2018 | 2018 MBC Drama Awards | Daesang (Grand Prize) | So Ji-sub | Won |
| 2018 | 2018 MBC Drama Awards | Drama of the Year | My Secret Terrius | Won |
| 2018 | 2018 MBC Drama Awards | Writer of the Year | Oh Ji-young | Won |
| 2018 | 2018 MBC Drama Awards | Top Excellence Award, Actor in a Wednesday-Thursday Drama | So Ji-sub | Won |
| 2018 | 2018 MBC Drama Awards | Excellence Award, Actor in a Wednesday-Thursday Miniseries | Son Ho-jun | Nominated |
| 2018 | 2018 MBC Drama Awards | Excellence Award, Actress in a Wednesday-Thursday Drama | Jung In-sun | Won |
| 2018 | 2018 MBC Drama Awards | Excellence Award, Actress in a Wednesday-Thursday Drama | Im Se-mi | Nominated |
| 2018 | 2018 MBC Drama Awards | Best Supporting Actor/Actress in a Wednesday-Thursday Drama | Kang Ki-young | Won |
| 2018 | 2018 MBC Drama Awards | Best Child Actor | Kim Gun-woo | Won |
| 2018 | 2018 MBC Drama Awards | Best Child Actress | Ok Ye-rin | Won |
| 2018 | 2018 MBC Drama Awards | Bromance Award | So Ji-sub, Son Ho-jun and Kang Ki-young | Won |