The fourth episode sees Brian in Australia looking at how the size of life affects each plant and animal, and how long it can survive.
| Title | Size Matters |
|---|---|
| Genres | Documentary |
| Release Date | 2013-02-17 |
| Episode Runtime | 00 Hours 59 Minutes |
| Season Number | 1 |
| Episode Number | 4 |
| Production Companies | BBC Productions |
