With the prosecution case concluded, the Doctor begins his defence, an adventure from his own future. Aboard the starliner Hyperion 3 in the year 2986, trouble is brewing. A murderer is aboard - and something very nasty's stirring in the hydroponics bay...
| Name | Type | Role | |
|---|---|---|---|
| Jane Baker | Writer | ||
| Pip Baker | Writer | ||
| Denys Hawthorne | Guest Star | ||
| Sam Howard | Guest Star | ||
| Michael Craig | Guest Star | ||
| Simon Slater | Guest Star | ||
| Honor Blackman | Guest Star | ||
| Tony Scoggo | Guest Star | ||
| Malcolm Tierney | Guest Star | ||
| Hugh Beverton | Guest Star | ||
| Yolande Palfrey | Guest Star | ||
| Leon Davis | Guest Star | ||
| Chris Clough | Director |