INTERACTIVE NETWORK ATLAS

Soviet Espionage:
From Cambridge
to the Atomic Age

Follow the network.
Watch it evolve.
Examine the evidence.

Explore the people, places, and networks behind the Cambridge Five, atomic espionage, and the secrets revealed by VENONA.

Explore the connections How to read the atlas

Illustrative artwork · places and routes are symbolic

People & the access they heldPlaces & the work done thereConnections & their evidence

A DIFFERENT KIND OF MAP

Geography tells you where.
Relationships help explain how.

A college, an embassy, a laboratory and a codebreaking room can belong to the same history without belonging to the same operation. This atlas helps you follow those distinctions.

Begin with a story. Move through time, switch lenses and inspect the evidence behind a connection. The same people, places and records appear in every lens. Drag icons to make room; choose Full Network for independent exploration.

THREE WAYS IN

Start with a question.

Each starting point opens a different part of the atlas.

THE INTERACTIVE ATLAS

A network changes with time.

WATCH THE NETWORK EVOLVE

1934Cambridge recruitment era

Year view shows active connections. ≈ means an approximate historical window.

ASK A DIFFERENT QUESTION OF THE SAME NETWORK

DIRECT CONNECTIONS

Kim Philby

Select a point to follow its connections. Lines show different kinds of relationship; read the dossier for each one.

Watch the whole network evolve. Follow the full atlas from 1930 to 1964. Pause or drag the year to explore.

YEAR1934

Cambridge recruitment era · Active connections; ≈ approximate period.

Layout

100%

OperationalRecruitment / transfer →Social / familyInstitution / work / accessInvestigationVENONA-supported

Shared ground is not shared guilt. A line states one relationship, not blanket collaboration. Open it to read the qualification.

A line may mean recruitment, employment, investigation or a transfer of information. It does not always mean collaboration.

Examine the relationship records

Include earlier, later and undated records

Find a person, place or institution

Search the directory

Search the complete database across every story and date

The directory follows this story and year. Search the complete database to find any record, including those outside the timeline; every dossier retains its full history.

READ THE EVIDENCE

A connection is the beginning
of the question.

Explore the linked source for each relationship. Open the dossier to see what the connection actually describes.

Solid lines show operational relationships; arrows show recruitment or information flow. Social and family ties are dashed; institutional, professional and access links are dotted. Investigation uses a distinct dash pattern. Amber marks VENONA support. Every relationship retains its own evidence status and date.

Dates matter.

The date of a message is not the date it was decrypted—or the date its subject was identified. The released VENONA collection should be read with that sequence in mind.

Institutions are not interchangeable.

The history of Soviet intelligence organizations includes changing state-security structures and a separate military intelligence service. The atlas preserves that distinction.

Shared ground is not shared guilt.

A place can connect a scientist, an agent and an investigator for entirely different reasons. Read the relationship label before drawing a conclusion from the line.

READING THE GROUND

Take the network back to the places.

Move between the human connections and the streets, institutions and landscapes that make them tangible.

BRITAIN

London

Explore the city’s intelligence landscape through the annotated London map.

Read the London map ↗UNITED STATES

New York

Return to the city behind the contacts, couriers and transatlantic traffic.

Read the New York map ↗UNITED STATES

Washington, D.C.

Put diplomatic access and the counterintelligence story into their urban setting.

Read the Washington map ↗

CONTINUE THE BRIEFING

The messages. The people.
The wider story.

Continue through The VENONA Files for the cryptanalytic story behind the amber connections. For a journey through Britain’s intelligence landscape, explore War Rooms & Walk-Ins.

About this edition and its sources

This is a curated starting network, not an exhaustive roster. Dossiers link to government records, institutional histories and specialist research. Absence from the atlas says nothing about a person’s historical role. Geographic markers identify sites or regions, not covert meeting coordinates.

The National Archives’ 2025 MI5 file release, the National Park Service’s Fuchs profile, and the FBI’s account of the atomic espionage investigation provide different windows into the record. Each should be read in context.

Time shows you when. Evidence tells you what we actually know.

Year selections use calendar-year resolution. Approximate windows are marked; they are not exact recruitment or appointment dates. Undated records remain accessible in All dates. People remain available as historical context after entering the story; visible lines carry the period-specific claims. This is a retrospective reconstruction, not a simulation of everything investigators knew at the time.

The hero is AI-generated editorial artwork. Historical portraits, where shown, are real archival photographs with credits in the dossier. Edition: September 2026.

Behind the Network