The crew find a ship flying in a circle they investigate and find the crew asleep and the control smashed. Someone has destroyed the controls and is killing the crew one by one trying to get their hands on the priceless neutrotope.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Stephen Tate | Guest Star | ||
| Brian Capron | Guest Star | ||
| Nigel Humphries | Guest Star | ||
| Carl Forgione | Guest Star | ||
| Kate Coleridge | Guest Star | ||
| Barry Jackson | Guest Star | ||
| Beth Morris | Guest Star | ||
| John Leeson | Guest Star | ||
| Pennant Roberts | Director |