Across
- 4. Error message for 3 down
- 5. Inspector ---: clumsy cartoon cyborg
- 6. Onetime star of the PM's Delivery Unit
- 8. double-barreled name shared by a onetime swedish princess and Greek queen
- 10. upstart google rival
- 12. Sacrificial Mycenaean princess
- 13. The personification of "good news"
- 14. Plumb pair
- 17. Ultimate answer to the mystery of the universe
- 19. The king of eventful journeys
- 20. Someone who "finds something that works in practice and wonders whether it would work in theory" according to a popular definition
Down
- 1. New-Age titan associated with combustible horse-drawn conveyances
- 2. Traditional leather maker
- 3. Ring-a-ding dinger
- 7. Suburban namesake of a mythical muscleman
- 9. Alter ego for Amal Coomes Inc
- 11. Team with the highest average Premier League position in the 20th century
- 15. Arcade aim
- 16. Kernel explosion
- 18. Her many namesakes include a great queen