- Title: 내 뒤에 테리우스 / Nae Dwie Teriuseu
- Also known as: Terius Behind Me
- Genre: Drama, mystery, romance, comedy
- Episodes: 32
- Broadcast network: MBC
- Broadcast period: 2018-Sep-27 to 2018-Nov-15
- Air time: Wednesday & Thursday 22:00 (2 episodes back-to-back)
- Original Soundtracks: My Secret Terrius OST
Go Ae Rin (Jung In Sun) is a single mother who, after unexpectedly losing her husband, finds herself involved in the crossfire between spies. She lives in the apartment opposite Kim Bon (So Ji Sub), code-named Terrius. Kim Bon is a legendary black-ops agent with the National Intelligence Service (NIS), who has kept himself hidden after a failed mission, which resulted in the death of a loved one. They join forces to uncover the big conspiracy, to which Go Ae Rin's husband was witness, and that cost him his life. Alongside them is Jin Yong Tae (Son Ho Joon), a former con man who may hold the key to the conspiracy, and Yoo Ji Yun (Im Se Mi), a fellow NIS agent who seems cold and insensitive on the outside, but harbors deeper feelings for Kim Bon.
Correlation Chart - click to enlarge
- Main Cast
- Ae Rin's family
- KIS (KingCastle Information System)
- NIS Agents
- 2018 37th MBC Drama Awards
- Grand Prize (So Ji Sub)
- Drama of The Year
- Top Excellence Award for an Actor in a Wednesday-Thursday Drama (So Ji Sub)
- Excellence Award for an Actress in a Wednesday-Thursday Drama (Jung In Sun)
- Best Supporting Actor/Actress in a Wednesday-Thursday Drama (Kang Ki Young)
- Best Young Actor (Kim Gun Woo)
- Best Young Actress (Ok Ye Rin)
- Writer of The Year (Oh Ji Young)
- Each night's broadcast is divided into two 35 minute episodes with a commercial break in between.
- Lee Yoo Young and Yoo In Na were each offered the lead female role, but declined.
- The drama's first script reading took place late June, 2018 in Sangam, South Korea at MBC Broadcasting Station.