Tasha Williams

Tasha Williams was a member of P.R.O.B.E., as well as the daughter of its Whitehall overseer Sir Andrew, with whom she had a rocky relationship.

Early life
At the age of seven, she lost her mother to a disease, after which she was effectively raised by babysitters and nannies due to her father's obsession with his career. (PROSE: The Door We Forgot)

Before she became a field agent of the Preternatural Research Bureau, Tasha used to work in Digitzation because her father got her a job there. (AUDIO: 9 to 5)

As a P.R.O.B.E. operative
When Archie MacTavish died, Tasha and Maxie took it in turns to buy Giles breakfast because they were worried about him. (WC: Manchester)

Giles suspected Tasha had something to do with Sir Andrew letting him withdraw his notice after Stacey Facade turned out to be an alien who seduced him. (WC: Stacey Facade) Some months after the Stacey Face incident, Tasha hit another rocky patch with her father and tried to get Giles's advice on the situation, staying at HQ after hours to discuss it with him. He ended the conversation, however, when she tried to ask him if he had any family of his own. Leaving, she decided to drop in on her father in person.

Two months later, while P.R.O.B.E. was investigating the organisation Beltane, Tasha helped Bedevere transport a Beltane agent he had taken prisoner back to P.R.O.B.E. HQ. There, Tasha was eager to interrogate her, although Giles gently but firmly reminded her that they "weren't the mafia" and that she was simply to ask the prisoner some questions, not do anything more coercive. Despite this promise, the woman swallowed a poison capsule to avoid interrogation; P.R.O.B.E. would later discover that Beltane had been a death cult of sorts, its members having planned to destroy all of London in a fire with no intention of leaving the city when that plan came to fruition.

After Giles discovered a second lead on the Beltane case with Maxie, namely another potential member, Jonathan, Tasha searched his apartment and indeed found much evidence of Beltane's activities, and information on their plans. Phoning Giles, who was by then in hot pursuit of the man himself alongside Harriet King, Tasha informed him that Beltane's plans seemed to centre on Modernex Labs. She joined him there with Bedevere; Giles hurriedly introduced Harriet as his niece, sparking mild resentment at Giles from Tasha for having dodged his question earlier when he clearly did have family. In a subsequent shootout between the four of them and four Beltane members including Jonathan, Tasha's shoulder was wounded, necessitating that Bedevere call an ambulance for her (despite his lack of familiarity with phones) while Giles and Harriet chased a surviving Beltane agent to the roof of the building. (AUDIO: Broken Bonds)

In November 2019, Tasha joined the rest of the P.R.O.B.E. team in a mission to investigate Bildbriain Dairies. After CEO Henry Bildbriain revealed that he was in fact an alien entity known as the Greth and regained its true form, Tasha immediately shot it, with no visible effect. She then tried to run for the door, which the Greth had already locked, resulting in it capturing her and using one of its abilities to render her unconscious. The Greth later did the same to all of the team save for Maxie, and Tasha awakened with the others once the Greth was defeated. (PROSE: Out of the Box)

On 28 March 2021, when Maxie's time detector allowed P.R.O.B.E. to discover that Faction Paradox members were performing a ritual across London, Giles attempted to send Tasha out into the field to investigate. However, the Faction then rewrote time to prevent P.R.O.B.E. ever having found out about their presence. (HOMEVID: Daylight Savings)

On 4 April, after Giles walked into HQ to find Maxie Masters unconscious on the floor, he immediately called the rest of the team in. He sent Tasha and Az to search Maxie's office for any clue as to what had happened to her, but they didn't find anything useful. Later, after Maxie became possessed by the Cyberon intelligence, Tasha and the rest of the team chased her to a cavernous area beneath Clapham Junction, where they found a crashed Cyberon pod. After the Cyberon fluid released Maxie so it could inhabit and revive the pilot, the resurrected Cyberon attempted to choke out Tasha and Az, but Giles and Maxie managed to activate the ship's self-destruct, distracting and ultimately destroying the Cyberon while the P.R.O.B.E. members made their escape. (HOMEVID: The Only Cure)