Modern Marvels: Season 21
This season started on July 25, 2021. The table lists episodes with recorded air dates up to September 28, 2026.
| Ep | Title and air date | My place |
|---|---|---|
| 1 | Adventure Machines · 44 min | |
| 2 | Heavy Machinery · 44 min | |
| 3 | Moving America · 44 min | |
| 4 | Power Tools · 44 min |
