As the Doctor leads the Pipe People towards reclaiming their world, Helen A faces betrayal from those closest to her.
| Name | Type | Role | |
|---|---|---|---|
| Graeme Curry | Writer | ||
| Philip Neve | Guest Star | ||
| Georgina Hale | Guest Star | ||
| Sheila Hancock | Guest Star | ||
| David John Pope | Guest Star | ||
| Ronald Fraser | Guest Star | ||
| Annie Hulley | Guest Star | ||
| Richard D Sharp | Guest Star | ||
| Tim Scott | Guest Star | ||
| Harold Innocent | Guest Star | ||
| Ryan Freedman | Guest Star | ||
| Rachel Bell | Guest Star | ||
| Chris Clough | Director |