| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | The Cryosphere |
March 16, 2018
|
25 | |
| S04E02 | Set Course for the Heart of the Sun |
March 23, 2018
|
25 | |
| S04E03 | Tickets Please |
March 30, 2018
|
25 | |
| S04E04 | Planet X |
April 6, 2018
|
25 | |
| S04E05 | Hyabusa 2 |
April 13, 2018
|
25 | |
| S04E06 | Fresh Eyes |
April 20, 2018
|
25 | |
| S04E07 | Mars Attractions |
April 27, 2018
|
25 | |
| S04E08 | Cubes |
May 4, 2018
|
25 | |
| S04E09 | Proving Einstein |
May 11, 2018
|
25 | |
| S04E10 |
Where are all the Aliens?
series finale
|
May 18, 2018
|
25 |
No artwork of this type.
No artwork of this type.
No artwork of this type.