London is the city Don Challenor tries to leave behind and the place where his work with Blake repeatedly draws him back. It begins as a pressured estate-agency market and a source of uncertain employment; it becomes a private base for examining Jane Glasson’s file, a stage for confronting the world around Jack Harkness, and finally the point from which Don and Blake set out separately. The city’s contrasting settings—from Don’s quiet Islington flat to the imposing houses of Belgrave Square—give the investigation an urban geography as varied as its changing demands.

Setting and urban contrasts

Don’s connection to London is initially economic. After leaving Mendez Chinnery, he is looking for another position in estate agency, a field he regards as especially competitive in the overheated central London market. His explanation for losing his job rests on a familiar evasion: he blames his former employer’s narrow-mindedness rather than his own corner-cutting. With age making a new berth less certain, he nevertheless assumes that an opportunity will appear. London is thus presented as a place where his confidence and practical prospects do not quite match.

The city also contains the private spaces from which the investigation proceeds. Don’s flat is in Islington, in a tall yellow-brick Georgian terrace divided into flats. Blake finds it spacious, tidy, and comfortable, but sparsely personal: it has a large bookcase, CDs and DVDs beside the hi-fi, and no framed photographs or art. Don’s joking comparison with the inside of Keith Perkins’ Volvo underscores Blake’s attention to the room’s lack of display. The flat provides a workable base without offering much evidence of a life arranged around possessions or personal history.

A different London appears around 53 Belgrave Square, Jack Harkness’s address. Blake knows the address from letters delivered to Wortalleth West and forwarded to Harkness in London. When she visits the square, she encounters immense white buildings with pillars, parapets, high windows, and chimneys; several are embassies, their flags marking national territories. A locked private garden occupies the centre, while a police officer patrols outside the Turkish Embassy. The square seems silent and empty, a setting whose formal grandeur contrasts with the investigation’s need to get close to the person living behind one of its imposing façades.

Don’s departure from the city

Fran Revell’s commission gives Don a reason to leave London after losing his position. She meets him at a nearby coffee shop rather than at her office, then contracts him to look after Wortalleth West, a property on the Lizard near Mullion. The change is at once professional and geographical: Don accepts work that takes him far from the London market in which he has just been dismissed. His old relationship with Fran remains part of the arrangement, but their cordial business contact does not erase the history of their marriage or Don’s awareness that pushing his luck helped wreck it.

Don drives west in his 1973 MGB GT V8, taking the M3, A303, and A30. The car matters to him as more than transport. He refuses to replace it despite criticism of its fuel use, and associates its leather and engine with childhood journeys driven by his father. On the open road, he feels London’s pressures recede; leaving the city seems to lift a weight from him. At Exeter Services he stops for a drink and a sandwich, considers the possibility of selling farmhouses and cottages in a provincial setting, and insists to the car that he will not trade it in. The journey makes his departure both a practical response to unemployment and an attachment to familiar things carried away from the city.

The city as an investigative base

London does not remain behind once Don reaches Cornwall. Amos French contacts him there and demands that he attend, provoking Don to set out in anger. During the walk from Poldhu Cove to the clifftop, Don begins to wonder how French knew when he would be available to speak. That suspicion connects the pressure exerted on him outside London to the wider inquiry, but the city soon becomes the place where he and Blake can work through its evidence directly.

In Islington, Don and Blake sit together at his desktop computer and slowly examine the Jane Glasson? file. The documents show that Ingrid Denner pursued Gareth Lawler’s report that Jane was alive and working in some capacity for Harkness Pharmaceuticals. Her correspondence with human resources produced increasingly detailed lists of employees, then exposed a gap: a group of nominally self-employed consultants, advisers, and outside specialists had not been included in the information supplied to her. London, in this sequence, is not merely an address for the people under investigation. Don’s home becomes a place where the records can be read, compared, and made to yield further questions.

The pursuit also takes Blake through central London. She arranges to meet Ingrid at Le Truc Vert, approaching along the opposite side of North Audley Street and arriving for breakfast. The encounter brings the investigation into an ordinary café, where Blake waits over green tea and French toast before Ingrid arrives with a leather briefcase. Later, Don and Blake go together to Belgrave Square. The frontage at number 53 is no longer still: marked police cars, an unmarked car, a uniformed officer, bystanders, and arriving detectives have transformed the scene. Don had expected Harkness’s house to be motionless; the activity outside it tells him that something has happened before he knows what.

Departure and narrative significance

London also serves as a point of separation. At Heathrow Airport, Don and Blake stand in the Terminal 5 departures hall as Blake prepares to fly for the first time. Don has bought her a phone because she has deliberately avoided being easily contactable, and he gives her a credit card as well. They now expect to stay in touch while travelling on separate routes, although neither knows what awaits at the end of the journey. Their departure marks a change in their working relationship: they describe themselves as a team, but Blake is still adjusting to that idea.

Across these episodes, London shifts from the source of Don’s professional frustration to the setting for cooperation, documentary discovery, confrontation, and departure. The outward drive in the MGB offers temporary relief from the city, but the investigation repeatedly requires a return to its homes and streets. Its varied scale matters: the quiet Islington flat supports patient reading, the café enables a meeting, Belgrave Square makes wealth and authority visible, and Heathrow turns the city into a threshold. London is therefore less a settled refuge than a hub through which Don and Blake pass as their work expands beyond it.