Harpoon missile

Harpoon missiles were very destructive weapons invented by humans in the 21st century and were only used by armed forces (i.e. the Navy, the Army).

Mickey Smith hacked into the UNIT website and released a harpoon missile under The Doctor's orders. This missile hit 10 Downing Street and completely destroyed it, and the Slitheen inside, thwarting their plot to destroy the world. (DW: World War Three)