| Season 6 | 2019-20 | 8.9/10 | ||
| 1 | New Beginnings |
 |
8.5 | |
| 2 | The Prophet |
 |
8.2 | |
| 3 | Ghosts, Gods and Running Dogs |
|
8.4 | |
| 4 | All the Prisoners |
|
8.1 | |
| 5 | The Key |
|
7.5 | |
| 6 | Death and the Serpent |
|
8.6 | |
| 7 | The Ice Maiden |
|
8.3 | |
| 8 | Valhalla Can Wait |
|
8.1 | |
| 9 | Resurrection |
|
8.3 | |
| 10 | The Best Laid Plans |
|
9.0 | |
| 11 | King of Kings |
|
9.2 | |
| 12 | All Change |
|
7.8 | |
| 13 | The Signal |
|
8.6 | |
| 14 | Lost Souls |
|
8.2 | |
| 15 | All at Sea |
|
7.0 | |
| 16 | The Final Straw |
|
7.5 | |
| 17 | The Raft of Medusa |
|
8.0 | |
| 18 | It's Only Magic |
|
7.8 | |
| 19 | The Lord Giveth… |
|
8.3 | |
| 20 | The Last Act |
|
8.7 |