Master Key is an interactive variety show where celebrities compete with one another and play various games in order to achieve victory each week. The players have to find those who have the two Master Keys, reasoning through an intense psychological warfare. The viewers become "Watchers" and participate in the game as well. By the number of votes, each star receives special abilities. Who will be chosen by the Watchers and become the final winner?
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Episode 1 | 2017-10-14 | 60 min |
| Season 1 | Episode 2 | Episode 2 | 2017-10-21 | 60 min |
| Season 1 | Episode 3 | Episode 3 | 2017-10-28 | 60 min |
| Season 1 | Episode 4 | Episode 4 | 2017-11-04 | 60 min |
| Season 1 | Episode 5 | Episode 5 | 2017-11-11 | 60 min |
| Season 1 | Episode 6 | Episode 6 | 2017-11-18 | 60 min |
| Season 1 | Episode 7 | Episode 7 | 2017-11-25 | 60 min |
| Season 1 | Episode 8 | Episode 8 | 2017-12-02 | 60 min |
| Season 1 | Episode 9 | Episode 9 | 2017-12-09 | 60 min |
| Season 1 | Episode 10 | Episode 10 | 2017-12-16 | 60 min |
| Season 1 | Episode 11 | Episode 11 | 2017-12-23 | 60 min |
| Season 1 | Episode 12 | Episode 12 | 2017-12-30 | 60 min |
| Season 1 | Episode 13 | Episode 13 | 2018-01-06 | 60 min |
| Directing | Lim Hyung-taek | Director |
