Gan's limiter malfunctions, and the crew go to space station XK-72 to have it repaired, at the risk of being discovered. The neurosurgeon notifies the Federation and delays surgery long enough for Federation forces to arrive.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Ian Thompson | Guest Star | ||
| Christian Roberts | Guest Star | ||
| Julian Glover | Guest Star | ||
| Vere Lorrimer | Director |