| Season 6 | 2019-20 | 6.5/10 | ||
| 1 | Into the Void |
 |
7.7 | |
| 2 | A Flash of the Lightning |
|
7.7 | |
| 3 | Dead Man Running |
|
7.1 | |
| 4 | There Will Be Blood |
 |
6.0 | |
| 5 | Kiss Kiss Breach Breach |
|
7.0 | |
| 6 | License to Elongate |
|
7.4 | |
| 7 | The Last Temptation of Barry Allen, Pt. 1 |
|
6.5 | |
| 8 | The Last Temptation of Barry Allen, Pt. 2 |
|
6.3 | |
| 9 | Crisis on Infinite Earths: Part Three |
 |
8.5 | |
| 10 | Marathon |
|
6.8 | |
| 11 | Love Is A Battlefield |
|
5.1 | |
| 12 | A Girl Named Sue |
|
6.7 | |
| 13 | Grodd Friended Me |
|
5.7 | |
| 14 | Death of the Speed Force |
|
5.5 | |
| 15 | The Exorcism of Nash Wells |
|
5.4 | |
| 16 | So Long and Goodnight |
 |
4.8 | |
| 17 | Liberation |
|
6.5 | |
| 18 | Pay the Piper |
|
6.0 | |
| 19 | Success is Assured |
|
5.5 |