The TARDIS arrives in an advanced future civilisation, which may be hiding a dark secret about the source of its prosperity.
| Name | Type | Role | |
|---|---|---|---|
| Ian Stuart Black | Writer | ||
| Andrew Lodge | Guest Star | ||
| Peter Thomas | Guest Star | ||
| Norman Henry | Guest Star | ||
| Edward Caddick | Guest Star | ||
| Tony Holland | Guest Star | ||
| Kay Patrick | Guest Star | ||
| Christopher Denham | Guest Star | ||
| Geoffrey Frederick | Guest Star | ||
| Christopher Barry | Director |