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Thomas Hector Schofield (born 12 October 1998), known as Hex, and later, after losing his memories, as Hector Thomas, was a staff nurse working at St Gart's Brookside Hospital in London in the year 2021, when he met the Seventh Doctor and Ace, with whom he then began to travel.
He was raised by his father and maternal grandmother Hilda Schofield, who he believed to be his mother until he was six years old. (AUDIO: Night Thoughts) He only had one photograph of his actual mother, who died in November 2004, which was in his flat in Shoreditch. He later regretted not retrieving it before beginning his travels with the Seventh Doctor and Ace. (AUDIO: No Man's Land)
Hex's father worked on the docks, but was forced to accept redundancy after an extended period of industrial action by workers. In doing so he lost his livelihood, and this experience plus constant reminders by Hex's grandmother convinced Hex to find a job that would always be in demand once he left school — so he went into medicine. (AUDIO: LIVE 34)
Meeting the Doctor
Hex first met the Doctor and Ace when they were investigating alien activity at St Gart's Hospital in October 2021. Hex saw Ace go into a police box and demanded to know what was going on. In answer, she let him into the TARDIS. He assisted the Doctor and Ace in their investigation of alien technology, which was in fact reverse-engineered Cyber-Technology. After that, Ace convinced the Doctor that Hex should join them on their travels. (AUDIO: The Harvest)
Shortly after meeting Hex for the first time in 2021, the Doctor realised he was the same Thomas Schofield that he knew as "Little Tommy," the son of Cassie Schofield, whom he had met during his sixth incarnation while travelling with Evelyn Smythe. (AUDIO: Project: Twilight, Project: Lazarus)
Injury and healing
Over time, Hex began to feel that he might not be suited to the life of a TARDIS traveller. This feeling was intensified by his experiences on the planet Bliss during the Dalek war. The many deaths that he witnessed performed by the Daleks and the larval Kiseibya deeply affected him. (AUDIO: Enemy of the Daleks)
To help Hex heal from these emotional wounds the Doctor took him to Scutari in September 1854 to meet his heroine Florence Nightingale. Hex chose to stay and help the nurses in the Crimean War rather than continue his travels. However, he met his friends again soon afterward when the Doctor sought to find the missing Ace. This adventure ended with Hex's being shot in the chest with a musket by Brigadier-General Bartholomew Kitchen. The Doctor and Ace rushed him into the TARDIS sickbay but he almost died. (AUDIO: The Angel of Scutari)
Hex was taken to the Forge in 2025 to be healed. In the Forge base, Nimrod and the Doctor told Hex of his mother's fate. Hex's mother, Cassie, was resurrected, and fought for Nimrod until they were evaporated by alien technology. Hex decided to walk away from his life in the TARDIS. (AUDIO: Project: Destiny)
Hex rejoined the Doctor and Ace after the Sixth Doctor's former companion Evelyn Smythe gave him her account of the Doctor's involvement in his mother's death. (AUDIO: A Death in the Family) The time travellers subsequently journeyed to Alaska in 1934. (AUDIO: Lurkers at Sunlight's Edge)
The two TARDISes
While the Doctor was travelling in his Black TARDIS, (AUDIO: Black and White) he sent Hex and Ace to 1989 in an alternative timeline. He gave them the mission to investigate the Elder Gods, who created this timeline. They defeated the Elder Gods, and restored the original timeline, just in time for a Black TARDIS to arrive and retrieve them. (AUDIO: Protect and Survive)
When they entered the Black TARDIS, they discovered Sally Morgan and Lysandra Aristedes already there. Upon discovering this, they realised that the Doctor was travelling in both TARDISes, simultaneously. Hex, Ace, Sally and Lysandra then arrived in 5th century, Denmark, where they met Beowulf, and faced an alien called Garundel. They discovered that the Doctor was previously in this location, but was kidnapped by an unknown enemy. After following the Doctor's clues and instructions, they retrieved an artefact called Weyland's shield, restored the original and destroyed the Black TARDIS, on their way to locate the Doctor. (AUDIO: Black and White)
The TARDIS crew located the Doctor in a pocket universe, which was under the control of Fenric. After releasing the Doctor, it was revealed that Fenric was playing a game against another Elder God, called Weyland, for control of Weyland's shield, which could grant omnipotence to an Elder God. It was also discovered that the TARDIS crew had been pawns of Weyland, used to help him win the game against Fenric, and Hex was destined to become the quintessential pawn in Weyland's plan, who prevented his death after being shot in Scutari. However, Hex managed to banish Weyland and stop the game, but became possessed by Fenric. Consequently, Hex sacrificed himself by entering the Time Vortex to prevent Fenric from permanently taking control and gaining power. However, Hex survived alongside Weyland and Fenric in the realm of the Elder Gods. (AUDIO: Gods and Monsters)
As "Hector Thomas"
In the realm of the Elder Gods, he bought himself a year back on Earth. However, in the process he lost his memories, and lived under the identity of "Hector Thomas". At the end of the year, the Doctor prevented a being called "Lily Finnegan" from taking him back to that realm. However, Hex still had not regained his memories. (AUDIO: Afterlife) As Hector Thomas, he and Ace were involved in an intimate relationship. Hector told the Doctor that while he might not measure up to Hex in Ace's eyes, he was content enough with himself as Hector. (AUDIO: Revenge of the Swarm)
After an incident in ancient Athens where he tried to pass himself off as the god Dionysus, Hector decided that traveling in the TARDIS was not for him and demanded to be taken home. (AUDIO: Mask of Tragedy) When he, the Doctor, and Ace returned to 2020s Liverpool, they discovered from an Elder God going by the name Janet Green that Hex's old memories, presumed destroyed, had actually still been preserved, stored inside a figurine of St. Christopher. Ace and Sally Morgan restored Hex's memories, but Hex still decided that it was time to settle back down. When the Doctor and Ace visited him again, circa 2042, they found that he and Sally had had a daughter, named Cassandra after Hex's mother. (AUDIO: Signs and Wonders)