Audacity enters another timeline as the mystery of the Causeway deepens.
| Name | Type | Role | |
|---|---|---|---|
| Henrietta Wolfmountain | Guest Star | Annika | |
| Richard Hope | Guest Star | Mr Barabbas | |
| Andrew Wincott | Guest Star | Peter Mansfield | |
| Poppy Miller | Guest Star | Professor Veronica Hays |