| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Planetariums |
January 14, 2021
|
15 | |
| S04E02 | Handheld Digital Pets |
January 28, 2021
|
15 | |
| S04E03 | Home Gaming Console / Smartphone Springs |
May 15, 2021
|
30 | |
| S04E04 | Neurosurgical Instruments / Weather Meters |
July 10, 2021
|
28 | |
| S04E05 | Body Fat Scales / Luggage Rack Mirrors |
July 31, 2021
|
28 | |
| S04E06 | Sushi Robots / Refractometers |
October 30, 2021
|
28 | |
| S04E07 | Camera Phones / Electron Microscopes |
November 20, 2021
|
28 | |
| S04E08 |
Radio Controlled Watches / Encrusting Machines
season finale
|
December 11, 2021
|
28 |
No artwork of this type.
No artwork of this type.
No artwork of this type.