Behind the scenes of David Attenborough's landmark series in which he visited the Great Barrier Reef, revealing how Sir David utilised the latest technology to explore the reef.
| Actor | Role |
|---|---|
 David AttenboroughSelf - Narrator | Self - Narrator |
 Barack ObamaSelf (uncredited) | Self (uncredited) |
| AAnthony GeffenSelf | Self |
| MMike DavisSelf | Self |
| AAnne HoggettSelf | Self |
| SSteve HudsonSelf | Self |
| DDean MillerSelf | Self |
| GGillian RenshawSelf | Self |
| MMark TaylorSelf (as Mark 'Buck' Taylor) | Self (as Mark 'Buck' Taylor) |
| KKathy TownsendSelf | Self |
| AAlexander VailSelf | Self |
| LLyle VailSelf | Self |
| MMadeleine van OppenSelf | Self |
| PPaul WilliamsSelf | Self |
| RRichard FitzpatrickSelf | Self |