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life—no matter what it cost." — Catherine Halsey to John-117 regarding her changed views. Doctor Catherine Elizabeth Halsey, (Civilian Consultant 409871,

intentions. Catherine Halsey in Halo: The Television Series is portrayed by actress Natascha McElhone. McElhone was originally cast to play both Halsey and Cortana

Dr. Halsey before transferring her into the Spartans' custody. Lasky: "Dr. Halsey, thank you for coming." Dr. Halsey shows her restraints. Halsey: "I'm

Dr. Halsey's personal journal was a journal detailing the thoughts and discoveries of Doctor Catherine Halsey over a period of 42 years, between August

The Search for Halsey is the first chapter of Spartan Ops' ninth episode, Key. In the wake of Doctor Catherine Halsey's abduction by Jul 'Mdama, all Spartan

universe through Dr. Catherine Halsey's computer and find exclusive material and content." — Official site summary Dr. Catherine Halsey's Computer is a marketing

full armor. Kat with her helmet off. Catherine-B320 in combat. Kat and Carter are debriefed by Catherine Halsey. Halsey demands that Kat return the data module

chamber. Keyes joins Halsey on the bridge of the Han. Halsey and Keyes sit at the Han's controls. Han as drawn by Catherine Halsey The bridge of the Han

September 14 Dr. Catherine Halsey prepares the Spartan-II program Candidate record on Carris-137. September 15 Dr. Catherine Halsey records in her journal

Keyes, born Miranda Halsey (service number 15972-19891-MK), was the daughter of the late Captain Jacob Keyes and Doctor Catherine Halsey. Miranda quickly

Catherine Halsey: "Zealots? You're certain?" Jorge-052: "Their armor configuration matched." SPARTAN-B312: "Shield strength, too." — Catherine Halsey,

"dumb" artificial intelligence who acted as a personnal assistant to Dr. Catherine Halsey and as one of the primary instructors for the candidates of the SPARTAN-II

personally witnessed her killed in the Battle of Miridem." — Doctor Catherine Halsey The Battle of Miridem was an engagement of the Human-Covenant War between

was a UNSC "dumb" Artificial Intelligence construct who assisted Dr. Catherine Halsey and Jacob Keyes during their Spartan-II candidate evaluation reconissence

vicinity secured Dr. Halsey comes online. She marks a point of interest inside the tower and tells Crimson to go near it. Halsey theorizes that the tower's

looks up at Halsey with an expression of blank obedience. Roland: "UNSC A.I. overide instructions active, Doctor Catherine Halsey." Halsey: "Roland, tell

end of their table. Interrogator: "Dr. Halsey?" Halsey looks at her speaker defiantly. Doctor Catherine Halsey: "You already know everything." Interrogator:

Doctor Catherine Halsey was brought aboard where she determined that the artifact was communicating information from the ship to Requiem. As Halsey later

construct created by Dr. Catherine Halsey. Although she was initially created as a platform for experimental software, Halsey decompiled, edited, and reconstructed

Galileo is the second chapter of Spartan Ops' third episode, Catherine. Fireteam Crimson arrive to Galileo Base via Pelican dropship. As they land, they

Doctor Catherine Halsey was brought aboard where she determined that the artifact was communicating information from the ship to Requiem. As Halsey later

the Spartan Ops chapter? "An alien AI full of human memories." — Dr. Catherine Halsey, after discovering the artifact's true nature. The "Didact's Gift"

still-classified challenge once given to Materials Group designers by Dr. Catherine Halsey. The Wilhelm helmet is available for multiplayer Spartan armor customization

it is an AI in Halsey's possession. In 2511, Halsey mentioned that she stored notes in Jorjet. In 2513, Jorjet and Déjá gave Dr. Halsey "a refresher" on

When Déjà tells Halsey she's arrived 14 minutes later than usual. None of that really mattered. It was just a means to an end for Dr. Halsey... a means to

"It's so easy for them to destroy us." — Doctor Catherine Halsey, after Arcadia's fall The Second Fall of Arcadia was the loss of the human Outer Colony

Shootout in Valhalla is the fourth chapter of Spartan Ops' third episode, Catherine. Picking up from the previous chapter, Spartan Jared Miller informs Commander

a Promethean Knight. Farther down, Lasky leads Catherine Halsey to the bridge. Doctor Catherine Halsey: "Captain, the Prometheans-" Captain Thomas Lasky:

gametype, VIP? The VIP is the first chapter of Spartan Ops' third episode, Catherine. Fireteam Crimson is sent on a mission to eliminate Parg Vol, a Sangheili

narration from Catherine Halsey regarding the current situation within the core of Onyx. Continuing from where they left off, Catherine Halsey, Chief Mendez

his projects often competed with Dr. Catherine Halsey's projects for funds, he had a long-standing rivalry with Halsey and her SPARTAN-IIs. He had a private

been wondering what your Spartans died for? They died for this." — Dr. Catherine Halsey to Carter-A259 A ship of Forerunner design was embedded within the

Ackerson. As Ackerson's private AI, Araqiel was tasked to spy on Dr. Catherine Halsey and her research. His avatar was that of an elongated skull with long

Sheila was with Dr. Halsey on Miridem when it came under assault by Covenant forces. Acting as Halsey's bodyguard, Sheila was escorting Halsey to an extraction

Jul 'Mdama's Covenant, and the Prometheans. During the battle Dr. Catherine Halsey was rescued by UNSC forces and Jul 'Mdama was assassinated. Before

Operation: WARM BLANKET was a UNSC operation to recover Dr. Catherine Halsey from Covenant captivity following the Battle of Miridem in 2544. SPARTAN-II

Hunting Trip is the fifth chapter of Spartan Ops' third episode, Catherine. Fireteam Crimson arrive to Parg Vol's location codenamed "The Gate". He is

speaker of the facility. Dr. Catherine Halsey was present, and opened the door for them. She was then checked out by Dr. Halsey and sent to survey perimeter

planet. It then cuts to inside the station showcasing parts being made. Catherine Halsey: "Mjolnir Exosuit is now complete." The parts are then began to be

Jerrod was one of the AIs in the ownership of Dr. Catherine Halsey. On December 11, 2529, while Halsey was struggling to get access into the Kig-Yar point

into a document called the "The Accra Incident". February 24 Doctor Catherine Halsey makes an entry in her personal journal in which she ponders the nature

personality gave the key to Dr. Catherine Halsey, instructing her to take the key to the Absolute Record. After Halsey reawakened in the Covenant-controlled

in the 26th century. May 28 Atriox is born on Doisac. August 8 Dr. Catherine Halsey makes the first entry in her journal following her enlistment in ONI's

Requiem. Catherine Halsey: "Life is too short, I will never learn all that exist in our tiny galaxy let alone the rest of the universe." Fades to Halsey sitting

Flash clones were used by Catherine Halsey to replace the kidnapped children of the SPARTAN-II program. Around the same time, Halsey flash cloned herself,

category. 2518 was a year in the 2510s in the 26th century. February 5 Dr. Catherine Halsey reviewed Kurt-051's progress noting he was good at bonding with his

Port Vernon was a coastal city on Endymion, and the birthplace of Catherine Halsey. At some point in the Human-Covenant War it was glassed with the rest

xenoarchaeologist working for the Office of Naval Intelligence. Dr. Catherine Halsey described his expertise as "invaluable" and noted that his intuitions

into the most dangerous ops. Catherine Halsey - ONI's former chief scientist and mother of the SPARTAN-II Program, Dr. Halsey has recently been stripped

size, from the size of a tablet computer to thumb-sized devices. Dr. Catherine Halsey kept a pad of information with her about the Spartan-II candidates

Intelligence to serve as a diplomatic shuttle before eventually being used by Catherine Halsey to survey the candidates for the SPARTAN-II program. In the post-war

Carter-A259: "Doctor-" Catherine Halsey: (looks back) You belong to ONI now." Cuts to Halsey pulling out the data storage unit. Catherine Halsey: "Lieutenant, she

pretext to bring you to me and have been overridden." — Catherine Halsey to Carter-A259 Dr. Catherine Halsey had actually been the cause of this. Using a tram

Covenant mobile planetoid, High Charity. The discovery is sent to Dr. Catherine Halsey for evaluation. February 28 Jun-A266 is born on Tyumen, New Harmony

Infinity in orbit, allowing his forces to board the ship and capture Dr. Catherine Halsey. Later, 'Mdama set Requiem on a collision course with the nearby star

equipment cabinet. From the silver disk a hologram is projected that Dr. Catherine Halsey described as looking like "a half-eaten dinner of spaghetti and meatballs

the television story. Endymion II on a planet. WHITE TOWER on Reach. Catherine Halsey High Charity The Rubble The United Nations Space Command armed forces

Jacob manning a M46 Vulcan. Jacob arguing with Catherine. Jacob Keyes thumbnail from Dr. Catherine Halsey's Computer. Halo: The Television Series Season

shuttle Han as drawn by Catherine Halsey in her journal. The bridge of the diplomatic shuttle Han as drawn by Catherine Halsey in her journal. The Han

on a ships hull in Slipstream space. The material was applied by Dr. Catherine Halsey for use in the reactive metal liquid crystal layer of the MJOLNIR Powered

pertaining to the planet Onyx is deemed classified. February 15 Dr. Catherine Halsey in her journal delineates the fundamentals of the SPARTAN-II program

their past from before entering the program were sealed away by Dr. Catherine Halsey. Emotional regulators were also installed in the SPARTAN-IIs lower

Catherine Halsey: "Blue Team, Commander Yao." Yao: "As you were." — Dr. Halsey announces Commander Yao's entry. Commander Yao was a UNSC Navy officer stationed

drill instructor. With Doctor Catherine Halsey, and Chief Petty Officer Franklin Mendez waiting for them on the stage. Halsey proceeded to tell the Spartans

of Catherine Halsey included as part of Hunt the Signal is the same image that can be seen on Halsey's ONI security badge included with Dr. Halsey's personal

background animation. Various shots of helmets belonging to NOBLE Team play. Catherine Halsey: "It didn't take long for Reach to fall. Our enemy was ruthless. Efficient

Government as part of its national currency, and much later acquired by Dr. Catherine Halsey as an antique. When testing a boy named John for his possible inclusion

colloquially known as PIEs, are software intrusion routines created by Dr. Catherine Halsey in conjunction with the Counter-Illegal Entry Protocols. By 2521, UNSC

Dr. Catherine Halsey decided to process candidates in Sector Four while her team would do the same in other sectors. One of the systems Dr. Halsey visited

Doctor Catherine Halsey was brought aboard where she determined that the artifact was communicating information from the ship to Requiem. As Halsey later

to December 4, 2510 Doctoral candidate Catherine Halsey meets Dr. Elias Carver at an academic social mixer. Halsey attempts to correct his formula for "the

drill instructor. With Doctor Catherine Halsey, and Chief Petty Officer Franklin Mendez waiting for them on the stage. Halsey proceeded to tell the Spartans

discovered in the underground Menachite portal complex on Reach by Dr. Catherine Halsey and the surviving Spartan members of Red Team in September 2552. The

discover the full extent of those ruins and likely never will." — Dr. Catherine Halsey The Menachite portal complex, referred to as a "temple" by the Covenant

drill instructor. With Doctor Catherine Halsey, and Chief Petty Officer Franklin Mendez waiting for them on the stage. Halsey proceeded to tell the Spartans

drill instructor. With Doctor Catherine Halsey, and Chief Petty Officer Franklin Mendez waiting for them on the stage. Halsey proceeded to tell the Spartans

very exciting time to be making science!" — Gribyam on Catherine Halsey Gribyam is an Unggoy member of the Swords of Sanghelios and a self-proclaimed biologist

defend the civilians from invaders. However, many civilians, such as Dr. Catherine Halsey are involved with the military. Main article: Civilian vehicles This

though Doctor Catherine Halsey was able to discover the project and strip it of useful information in 2515. This information was used by Halsey to inform the

soir". The piece held some relevance for Doctor Catherine Halsey and Cortana. It was playing when Halsey transferred Cortana into an armored matrix on Reach

educational academy on the human colony planet of Endymion. At a young age, Catherine Halsey attended the school, where she defied the academy's educatory standards

beyond the boundaries of its settlements. Port Vernon Endymion Gifted Catherine Halsey At some point during the Human-Covenant War it was glassed by the Covenant

report is made on geological studies carried out on Onyx. March 19 Catherine Halsey is born in the coastal city of Port Vernon on Endymion. March 21 Franklin

John-117: "War extracts a heavy toll from those it touches." 343 INDUSTRIES Catherine Halsey: "You are hereby conscripted into UNSC special project codename Orion-II

Miranda, and Catherine cross over a light bridge. A holographic display of the Flood infecting the galaxy. A dead Forerunner scientist. Catherine gazes at

forced back out a quarter of a kilometer of her last position. Dr. Catherine Halsey explained to 'Mdama that the artifact allowed her to communicate with

Doctor Halsey has been abducted." Cut to inside the Forerunner shrine. Inside is a ghostly expanse, where the Librarian lives. She towers over Halsey and

December 5 The Jiralhanae Ballas is born on Doisac. After a young Catherine Halsey continues to defy educatory standards at Endymion Gifted, the Koletre-Browning

Rest". Captain Lasky requested Doctor Catherine Halsey to be brought onboard Infinity to study the artifact. Halsey found out that the artifact was communicating

Hungarian town on Earth. Halsey: "What have you done with my armor?" Jorge: "Just some... additions I've made." — Catherine Halsey and Jorge-052 discuss Jorge's

2552, Dr. Catherine Halsey, along with the sedated Kelly-087, stole the ship and left via Slipspace, having bypassed the ONI locks. Halsey navigated Beatrice

trainer instantly. She was later seen crying outside her barracks. Dr. Catherine Halsey and Chief Petty Officer Franklin Mendez decided not to take disciplinary

voices of Cortana, Dr. Catherine Halsey, and The Weapon in the Halo series. In Halo 4, she also performed the motion capture for Dr. Halsey. She wound up reprising

as we do. Hormonal pellets have suppressed his emotions." — Doctor Catherine Halsey to HIGHCOM The emotional regulator was a hormonal pellet embedded in

universities on the human Inner Colony world of Circumstance. After a young Catherine Halsey continued to defy educatory standards at Endymion Gifted, the university's

battle, it was used to evacuate civilians off the planet, including Catherine Halsey. However, it was intercepted by the Covenant before it could reach

Doctor Catherine Halsey was brought aboard where she determined that the artifact was communicating information from the ship to Requiem. As Halsey later

War and were remembered as war heroes, with the exception of Dr. Catherine Elizabeth Halsey, who was labeled as a war criminal despite being instrumental

personal friend to Dr. Catherine Halsey, and analyzed a number of 'hypothetical' experiments on bonobo chimpanzees for Dr. Halsey in 2525. She was his star

This article is about the Sangheili. For the shuttle used by Dr. Catherine Halsey, see Han. "You are stubborn to a fault." — Fal 'Chavamee, referring to