| Answer | Crossword Clue |
|---|---|
| SPACESHIP | One-time fictional idea. |
| SPACEMAN | One-time fictional character. |
| HAS | "An idea whose time ... come" |
| GESTATE | Develop over time, as an idea |
| SEEMED | Darkness "... Like a Good Idea at the Time" |
| TARDIS | Fictional spacecraft created by the Time Lords |
