Across
- 2. BBC Drama about con artists
- 4. Noble gas used in ornamental lighting
- 5. John George, the acid bath murderer
- 11. UK Gameshow and also arch nemesis of comic hero Daredevil
- 12. Atmospheric layer that filters UV rays
- 14. Deepest ocean trench on earth
- 15. The mother of invention
- 18. Ink used in tattoos
- 19. Explosive derived from woodchip and potasssium
- 21. Famous 80's brand of potato crisps
- 23. Unit of liquid density, measured in degrees
Down
- 1. Underground London river
- 3. Study of suspected alien spacecraft
- 6. Church cushion
- 7. Safety manager of a coal mine
- 8. Land with a soft swampy surface
- 9. Native American tribe originating from what is now New Mexico
- 10. Tyenside city's Roman name
- 13. The Holy See
- 16. Outer layer of teeth
- 17. Transparent front of the eye
- 20. The first casualty of war
- 22. Currency of Russia