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Sir Alistair Gordon Lethbridge-Stewart was one of the founders of UNIT and commander of its UK operations. From his second incarnation onwards, the Doctor long considered the Brigadier one of his most trusted human allies and closest friends


Early life

Alistair Gordon Lethbridge-Stewart was born in 1930. (NA: Blood Heat) An only child, he was raised in Simla, India. (PDA: Island of Death)

He was pressured strongly by his grandfather to join the military. One Christmas, he was given a box of toy solders and then asked "What do you want to be when you grow up?" (DWM: The Warkeeper's Crown)

He was sent to an English prep school. His mother died after he left for England. (PDA: Island of Death) He also attended Holborough, where he first met Teddy Fitzoliver. (BBCR: The Paradise of Death)

Military Career

Young Lethbridge-Stewart was pressured to live up to the military traditions of the Lethbridge-Stewart family. (DWM: The Warkeeper's Crown)

He began his military career around 1953 and attended Sandhurst Military Academy with Major General Rutlidge. (DW: Mawdryn Undead) He had great ambitions even then. (MA: Who Killed Kennedy)

Shortly after the end of the Second World War, twenty-one-year-old Lethbride-Stewart was assigned to a Royal Navy mission to update British maps of the Greek Islands. He ended up in Albania on a mission against Stalinist rebels. He ran into the Immortals and fell in love with the immortal Persephone. He entered the Underworld and fought against Hades for her. They spent two weeks together before she reluctantly wiped his memory. (PDA: Deadly Reunion)

He later joined the Scots Guards and was stationed for a time at Aldgate. (DW: The Green Death)

Lethbridge-Stewart lost his virginity to a girl named Vera whilst drunk on the night of his passing out as a fully commissioned second lieutenant. (PDA: Deadly Reunion)

Lt. Lethbridge-Stewart was stationed in Sierra Leone some time in the 1960s, where he met and fathered a son, Mariamma, with Mariatu, eldest daughter of Chief Yembe of the Rokoye village. (NA: Transit)

During the same decade, Lethbride-Stewart had a romantic encounter with Doris on Brighton Beach. (DW: Planet of the Spiders) Their relationship ended when Lethbridge-Stewart was dispatched overseas. (DWM: The Warkeeper's Crown)

On returning to Britain, Lethbridge-Stewart met and married Fiona. (MA: The Scales of Injustice)

Formation of UNIT

Colonel Lethbridge-Stewart was the second commander of the British Army forces opposing the Great Intelligence's assault on London. He replaced the deceased Colonel Pemberton. He was the sole survivor of a Robot Yeti assault at Holborn before heading down to the London Underground to take command. Lethbridge-Stewart met the Second Doctor. Lethbridge-Stewart showed a quick, decisive manner and a ready acceptance of events, even believing the story about the TARDIS from the start. (DW: The Web of Fear)

After the London Event, Fiona gave birth to Lethbride-Stewart's child, whom they named Kate. (MA: The Scales of Injustice)

Lethbridge-Stewart met with Air Vice-Marshall "Chunky" Gilmore and learned of the 1963 Shoreditch Incident, where hostile aliens had visited Earth. Gilmore himself had helped fight them off with the Seventh Doctor. He also learnt of evidence of alien visits to Earth that went back thousands of years. (MA: Downtime)

Colonel Lethbrigde-Stewart went to the government and pitched the idea of a permanent military intelligence group with rapid-reaction capability to investigate alien and other unusual phenomena that threatened the nation. This was turned down. He risked his career by petitioning the United Nations to form such a group. (MA: Who Killed Kennedy) UNIT was organised and Lethbridge-Stewart was promoted to Brigadier and appointed head of the United Kingdom branch. (DW: The Invasion) This made him unpopular with many senior British officers. (MA: Who Killed Kennedy)

UNIT Years


After UNIT




Undated events

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Alternate Timelines


Main page: Brigade Leader Lethbridge-Stewart

Final Genesis

The Brigadier and the Third Doctor died saving humanity from a hostile Silurian faction during the Wenley Moor incident. Humans and Silurians made peace and the fact it continued after their deaths was a tribute to their skill and force of character. (DWM: Final Genesis)

Blood Heat

The Third Doctor died at Wenley Moor and the Silurians took over Earth in a hostile fashion, leaving the Brigadier and the remnants of UNIT to fight them for thirty years. The Seventh Doctor of N-Space and his companions arrived in that universe and assisted in a reconciliation between the species. (NA: Blood Heat)

Psychological profile



Habits and Quirks











Behind the scenes