| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Energy |
January 13, 2005
PBS
|
30 | |
| S04E02 | Engineering |
January 20, 2005
PBS
|
30 | |
| S04E03 | Animal Behavior |
January 27, 2005
PBS
|
30 | |
| S04E04 | Friction |
February 3, 2005
PBS
|
30 | |
| S04E05 | Sound |
February 10, 2005
PBS
|
30 | |
| S04E06 | Canines |
February 17, 2005
PBS
|
30 | |
| S04E07 | Science at Play |
February 24, 2005
PBS
|
30 | |
| S04E08 | Earth Systems |
March 3, 2005
PBS
|
30 | |
| S04E09 | At the Zoo |
March 10, 2005
PBS
|
30 | |
| S04E10 | Chemistry |
March 17, 2005
PBS
|
30 | |
| S04E11 | Human Body |
March 24, 2005
PBS
|
30 | |
| S04E12 | Mammals |
March 31, 2005
PBS
|
30 | |
| S04E13 |
Simple Machines
season finale
|
April 7, 2005
PBS
|
30 |
No artwork of this type.
No artwork of this type.
No artwork of this type.