Some 250 million years ago, all but five per cent of life on Earth was wiped out in the greatest disaster our planet has ever experienced, yet the cause of this event has long remained a mystery. Palaeontologists in Greenland explain the answers.
| Actor | Role |
|---|---|
 Jack FortuneNarrator | Narrator |
| AAdrian JonesSelf | Self |
| VVincent CourtillotSelf | Self |
| GGregory RetallackSelf | Self |
| PPeter WardSelf | Self |
| PPaul WignallSelf | Self |
| MMichael BentonSelf | Self |
| MMichael R. RampinoSelf | Self |