Ruby Sunday faces life back on Earth without the Doctor. But when a dangerous new threat emerges, can Ruby and UNIT save her new boyfriend Conrad from the terrifying Shreek?
| Name | Type | Role | |
|---|---|---|---|
| Pete McTighe | Writer | ||
| Lachele Carl | Guest Star | Trinity Wells | |
| Paddy Stafford | Guest Star | Sparky | |
| James Craven | Guest Star | Influencer 3 | |
| Jemma Redgrave | Guest Star | Kate Lethbridge-Stewart | |
| Gethin Alderman | Guest Star | The Shreek | |
| Reeta Chakrabarti | Guest Star | Herself | |
| Blake Anderson | Guest Star | Jack | |
| Selorm Adonu | Guest Star | Influencer 1 | |
| Alexander Devrient | Guest Star | Colonel Christopher Ibrahim | |
| Kareem Alexander | Guest Star | Jordan Lang | |
| Joel Dommett | Guest Star | Himself | |
| Aoife Gaston | Guest Star | Michelle | |
| Benjamin Chivers | Guest Star | Young Conrad | |
| Aidan Cook | Guest Star | The Vlinx | |
| Tina Gray | Guest Star | Audrey | |
| Faye McKeever | Guest Star | Louise Miller | |
| Alex Jones | Guest Star | Herself | |
| Paul Jerricho | Guest Star | Alfie | |
| Kirsty Hoiles | Guest Star | Moira Clark | |
| Nicholas Briggs | Guest Star | The Vlinx | |
| Ruth Madeley | Guest Star | Shirley Bingham | |
| Madison Stock | Guest Star | Elsa | |
| Calypso Cragg | Guest Star | Influencer 2 | |
| Michael Woodford | Guest Star | Derek | |
| Jonah Hauer-King | Guest Star | Conrad Clark | |
| Peter Hoar | Director |