Foreign Hazard Duty

The Foreign Hazard Duty was a military taskforce at some point in Earth's future, being called in to crisis scenes on foreign planets.

The idea of a Foreign Hazard Duty was first mused by Muriel Frost, near the end of the 20th Century, as a possible replacement for UNIT. (DWM: The Mark of Mandragora)

The Doctor first encountered the Foreign Hazard Duty on the planet Mekrom, on the edge of known space. Commander Hurd's FHD team were sent to rescue the inhabitants of a human colony there, but all appeared to have been killed by Mogor. The Doctor revealed that these were ghosts, and the deaths from shock, rather than a living enemy. (DWM: Echoes of the Mogor)

An FHD team under Commander Lumsden would attempt to stop a species of bookworm from eating their way through the library planet Catalog. The Doctor would help them out, revealing the creatures to be primordial entities. (DWM: Hunger from the Ends of Time)

An FHD team under Captain Geoff Monmouth would be sent to guard important ruins on Aleph 777 from the Sontarans. As the Sontarans were sent to guard it from the humans, both sides were caught in a violent stalemate. (DWM: Conflict of Interests)

Behind the Scenes
The original FHD were clearly inspired by the Colonial Marines from Aliens, with the first team seen sharing names and visuals with characters from Alien and Aliens.

The FHD were created and written exclusively by Dan Abnett.