Cybermats are sent to the Wheel to eat the station's supply of bernalium, forcing the Wheel to search for bernalium on the Silver Carrier where the Cybermen are waiting for them.
| Name | Type | Role | |
|---|---|---|---|
| David Whitaker | Writer | ||
| Peter Laird | Guest Star | ||
| Kevork Malikyan | Guest Star | ||
| Kenneth Watson | Guest Star | ||
| Anne Ridler | Guest Star | ||
| Tristan DeVere Cole | Director |