7.90 avg 6 episodes 8.1 → 7.8 79 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Death and the Civil War | 8.1 | 164 |
| 2 | The Abolitionists: Part 1 | 8.0 | 133 |
| 3 | The Abolitionists: Part 2 | 8.0 | 100 |
| 4 | The Abolitionists: Part 3 | 7.7 | 100 |
| 5 | Henry Ford | 7.8 | 287 |
| 6 | Silicon Valley | 7.8 | 222 |
7.80 avg 10 episodes 7.1 → 8.1 93 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Tesla | 7.1 | 594 |
| 2 | The Battle of Chosin | 7.8 | 537 |
| 3 | Command and Control | 7.9 | 116 |
| 4 | Rachel Carson | 7.8 | 152 |
| 5 | The Race Underground | 7.2 | 207 |
| 6 | Oklahoma City | 8.2 | 164 |
| 7 | Ruby Ridge | 7.5 | 429 |
| 8 | The Great War: Part 1 | 8.2 | 159 |
| 9 | The Great War: Part 2 | 8.2 | 130 |
| 10 | The Great War: Part 3 | 8.1 | 130 |