A contract killer gets entangled with a murder case and three terminally ill women who have each decided to end the life of one person before they die.
You can now watch The One and Only online on the following streaming providers in the United States.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Episode 1 | 2021-12-20 | 80 min |
| Season 1 | Episode 2 | Episode 2 | 2021-12-21 | 80 min |
| Season 1 | Episode 3 | Episode 3 | 2021-12-27 | 80 min |
| Season 1 | Episode 4 | Episode 4 | 2021-12-28 | 80 min |
| Season 1 | Episode 5 | Episode 5 | 2022-01-03 | 80 min |
| Season 1 | Episode 6 | Episode 6 | 2022-01-04 | 80 min |
| Season 1 | Episode 7 | Episode 7 | 2022-01-10 | 80 min |
| Season 1 | Episode 8 | Episode 8 | 2022-01-11 | 80 min |
| Season 1 | Episode 9 | Episode 9 | 2022-01-17 | 80 min |
| Season 1 | Episode 10 | Episode 10 | 2022-01-18 | 80 min |
| Season 1 | Episode 11 | Episode 11 | 2022-01-24 | 80 min |
| Season 1 | Episode 12 | Episode 12 | 2022-01-25 | 80 min |
| Season 1 | Episode 13 | Episode 13 | 2022-01-31 | 80 min |
| Season 1 | Episode 14 | Episode 14 | 2022-02-01 | 80 min |
| Season 1 | Episode 15 | Episode 15 | 2022-02-08 | 80 min |
| Season 1 | Episode 16 | Episode 16 | 2022-02-08 | 80 min |
| Writing | Moon Jung-min | Writer |
| Directing | Oh Hyun-jong | Director |
| Sound | Kim Jun-seok | Original Music Composer |
