The Doctor and his friends must locate the real murderers and the fourth key before heading off for a final confrontation with the Voord
| Title | The Keys of Marinus |
|---|---|
| Genres | Drama Action & Adventure Sci-Fi & Fantasy |
| Release Date | 1964-05-16 |
| Episode Runtime | 00 Hours 25 Minutes |
| Season Number | 1 |
| Episode Number | 26 |
| Production Companies | BBC |
