Checkmate (2026) featured a cast of 7 tracked actors. Of these, 3 (100%) are still alive today. The oldest surviving cast member is Kwon Oh-soo, age 69. This TV series starred Chun Woo-jin and Lee Sung-shin.
100% still with us· verified cast43% of full cast · incl. 4 unverified
Survivorship
Cast Reunion Index: 100% still living
Cast7 members
| Person | Character | Status | DOB | Age | DOD | Age in 2026 |
|---|---|---|---|---|---|---|
 Chun Woo-jin Lee Soo-hyun | Lee Soo-hyun | Living | 18/07/1997 | 29 | — | 29 |
 Lee Sung-shin Jung Eun-sung | Jung Eun-sung | Living | 17/03/1998 | 28 | — | 28 |
 Kwon Oh-soo Park Mun-seop | Park Mun-seop | Living | 16/05/1957 | 69 | — | 69 |
 Lee Jong-min Lee Shin-hae | Lee Shin-hae | Unverified | — | — | — | — |
 Wi Chang-woo Sung Hee-won | Sung Hee-won | Unverified | — | — | — | — |
 Yoo Jung-min Kim Min-seok | Kim Min-seok | Unverified | — | — | — | — |
 Lee Jin-hwan Kim Seo-jun | Kim Seo-jun | Unverified | — | — | — | — |