Roger has been haunted by a recurring dream, a mysterious house and an unseen terror. He becomes disturbed as they become reality. What is lurking in the room in the tower?
| Name | Type | Role | |
|---|---|---|---|
| Mark Gatiss | Writer | ||
| Nancy Carroll | Guest Star | Verity Gordon Clark | |
| Ben Mansfield | Guest Star | John Clinton | |
| Polly Walker | Guest Star | Mrs Clinton | |
| Tobias Menzies | Guest Star | Roger Winstanley | |
| Joanna Lumley | Guest Star | Mrs Stone | |
| Mark Gatiss | Director |