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This article contains information from the Silver Timeline universe, and is not a part of the established Halo canon. To see information about this article's counterpart in the canon Halo universe, see here
Catherine Halsey
Catherine Halsey vibin
Biographical information

Children:

Miranda Keyes

Personal details

Species:

Human

Gender:

Female

Political and military information

Affiliation:

United Nations Space Command

Rank:

Civilian scientist

 

Doctor Catherine Elizabeth Halsey is a civilian scientist for the UNSC. She is the creator of the Spartan super soldiers, particularly the SPARTAN-II's.[1]

BiographyEdit

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Early life and careerEdit

Not much is known of Halsey's early life in the Silver timeline, but she had worked on the planet Onyx in her early days as a UNSC scientist.

Finding John and the other SPARTAN candidatesEdit

Creating Cortana and dealing with a rogue Master ChiefEdit

Return to Eridanus IVEdit

At conflict with ONI, Chief and everyoneEdit

Desperate power grab attempt and escapeEdit

In ONI custodyEdit

Reunion with the deserter and the Fall of ReachEdit

Coming to terms with JohnEdit

Reunion with Miranda on Onyx and cracking Forerunner secretsEdit

Infection by the FloodEdit

Personality and traitsEdit

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A brilliant but overly ambitious scientist, Catherine Halsey is devoted to the advancement of humanity, but will often use unethical means to achieve it, such as using and killing a live clone of herself to create Cortana, kidnapping and enlisting children against their will into the SPARTAN-II program before wiping their memories and subjecting them to horrific augmentations, and attempting to replace the human consciousness of the SPARTAN-II's with AI to make them "more controllable", as she attempted to do with John-117 and Cortana. This eventually put her at odds with ONI, the UNSC, and even with her SPARTANs when they discovered the truth of their upbringing and her ultimate intentions.

Production notesEdit

Catherine Halsey in Halo: The Television Series is portrayed by actress Natascha McElhone.[1] McElhone was originally cast to play both Halsey and Cortana, much like Jen Taylor did for Halo 4, Halo 5: Guardians, and Halo Infinite. However, due to scheduling difficulties caused by the COVID-19 pandemic, McElhone was unable to complete her work as Cortana, so Jen Taylor was brought onboard the project to reprise her role from the games.[2]

GalleryEdit

List of appearancesEdit

SourcesEdit