Great Fire of London

The Great Fire of London was started as a result of a Terileptil weapon overloading in London in 1666, the resulting explosion destroyed the building located in Pudding Lane. The Doctor left the scene while Richard Mace attempted to put the fire out. (DW: The Visitation) A later incarnation took credit for the fire but stated it was completely necessary. (IDW: Black Death White Life)

Prior to witnessing the cause, the Doctor had been accused of starting the fire. (DW: Pyramids of Mars) The Fourth Doctor witnessed the outset of the fire at a distance and urged the Republicans and the forces of Charles II to stop fighting and work together to put out the fire. Sergeant Mullens, suspicious of the strangeness of the Doctor and Sarah Jane Smith attempted to arrest them for starting the fire. (ST: The Republican's Story)

The First Doctor accidentally materialised his TARDIS in the midst of the fire outside of a swineherd's burning house. George Mortimer and his family stumbled inside the TARDIS and travelled with him to the future. (DWA: Doctor Who and the Invasion from Space)

The Dogon arrived around the time of the Great Fire of London and a Dogon Sixth Eye was first found shortly after. (WEB: torchwood.org.uk)

The fire eventually proved helpful in clearing plague from the city. (DW: The Visitation)

As the Terileptil involvement wasn't known, it was widely believed that the people of London were so scared they set fire to London. Alistair Gryffen noted this as an example of events concerning the spread of fear. (K9TV: Fear Itself)