The Doctor and his companions are escorted to the Sense-Sphere where they attempt to negotiate with the Sensorites for the release of the TARDIS.
| Name | Type | Role | |
|---|---|---|---|
| Peter R. Newman | Writer | ||
| Arthur Newall | Guest Star | ||
| Bartlett Mullins | Guest Star | ||
| Lorne Cossette | Guest Star | ||
| Eric Francis | Guest Star | ||
| Arthur Newall | Guest Star | ||
| Peter Glaze | Guest Star | ||
| Joe Greig | Guest Star | ||
| Stephen Dartnell | Guest Star | ||
| Ken Tyllsen | Guest Star | ||
| Ilona Rodgers | Guest Star | ||
| Mervyn Pinfield | Director |