As hostilities break out between factions vying for ownership of the comet, the Doctor goes after the worst of the lot - Cybermen, using Ace's upgraded boom box to flood Cyber Communications with jazz music while trying to locate the whereabouts of the fleet beyond this mere scouting party.
| Name | Type | Role | |
|---|---|---|---|
| Kevin Clarke | Writer | ||
| Chris Chering | Guest Star | ||
| Anton Diffring | Guest Star | ||
| Brian Orrell | Guest Star | ||
| John Ould | Guest Star | ||
| Metin Yenal | Guest Star | ||
| Dave Ould | Guest Star | ||
| Symond Lawes | Guest Star | ||
| Gerard Murphy | Guest Star | ||
| Chris Clough | Director |