Backdoor (2026) featured a cast of 7 tracked actors. Of these, 2 (100%) are still alive today. The oldest surviving cast member is Jung Jae-bin, age 34. This TV series starred Jang In-kyu and Gu Do-hyung.
100% still with us· verified cast29% of full cast · incl. 5 unverified
Survivorship
Cast Reunion Index: 100% still living
Cast7 members
| Person | Character | Status | DOB | Age | DOD | Age in 2026 |
|---|---|---|---|---|---|---|
 Jang In-kyu Kwon Do-yoon | Kwon Do-yoon | Unverified | — | — | — | — |
 Gu Do-hyung Seo Ji-hyuk | Seo Ji-hyuk | Unverified | — | — | — | — |
 Jung Jae-bin Seo Young-woo | Seo Young-woo | Living | 05/02/1992 | 34 | — | 34 |
 Mun-Seokho Audit Team Manager | Audit Team Manager | Living | 10/02/1994 | 32 | — | 32 |
 Baek Kang-yoon Secretary Kim | Secretary Kim | Unverified | — | — | — | — |
 Ji Seung-jin Male Employee | Male Employee | Unverified | — | — | — | — |
 김지현 Female Employee | Female Employee | Unverified | — | — | — | — |