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The Expanse Wiki

This page is about the Tv icon TV character. For the books incarnation, see Julie Mao (Books).

Book-icon-simple Books character Tv icon TV character

Juliette "Julie" Andromeda Mao was the younger daughter of Jules-Pierre Mao, the CEO of one of the most powerful corporate conglomerates in the Sol system, Mao-Kwikowski Mercantile. Rebellious and headstrong by nature, Julie defied her father and denied any involvement with his corporatist ideals. She joined a student activist group whilst in college. After running away from Earth, she is known to have travelled the belt.

After her encounter with the protomolecule, she was infected and ultimately died of it.



Julie was born on Earth to a billionaire, Jules-Pierre Mao. She was a talented pilot and eventually became a racer, piloting her personal ship the Razorback. She was also highly motivated and determined, teaching herself archery in a day as testified by her father in a conversation with Sadavir Errinwright.

Julie rebelled against her family and eventually ran away off Earth, arriving on Ceres soon thereafter. There, she joined the Outer Planets Alliance where she was given the code name Lionel Polanski. Facing pressure from her industrialist father to return home, Julie hired a data broker to hack into his computers. She discovered a classified project in development that could shift the balance of power in the Sol system. She uncovered its origins to be on Phoebe and that the mysterious substance, later revealed to be the protomolecule, was being transported to Eros aboard the Anubis. The data broker eventually managed to find out the Anubis' flight path.

Later, Julie approached Anderson Dawes, Ceres’ liaison for the OPA, with the secret project information and a plan to steal it. Fred Johnson, the de facto leader of an influential moderate OPA wing, sent the Scopuli to intercept the secret project being transported on the Anubis. The Scopuli was able to intercept the Anubis mid-flight but the latter was better-armed, disabling the Scopuli and boarding it. The crew of the Anubis took over the Scopuli and killed everyone on board except for Julie, who was recognized as being the daughter of Jules-Pierre Mao and was thrown into a locker. When the bioweapon contaminated the crew and their prisoners, Julie became the only survivor.

Escaping the Anubis, Julie ventured off to Eros. There, she discovered that she had been infected and decided to barricade herself in a flophouse. Using the codename Lionel Polanski, she contacted Anderson Dawes and the OPA but did not receive a message back. Eventually, Julie succumbed to the protomolecule infection and died. Her consciousness, however, became a part of the protomolecule and altered the alien pathogen's behavior.

Throughout the series[]

In "Dulcinea", a distress signal originating from the Scopuli attracts the Canterbury. While a small crew led by James Holden goes to investigate the Scopuli and offer rescue, the Anubis, hidden via stealth technology, destroys the Canterbury.

In "The Big Empty", with the Martian warship Donnager closing in on them, James Holden reveals evidence that a MCRN ship blew up the Canterbury. Prejudices, old and new, drive the system to the brink of war. Meanwhile, Julie escapes the Anubis and ventures off to Eros.

In "Remember the Cant", Josephus Miller watches some footage of Julie defending an attacker in the Docks.

In "Rock Bottom", it is revealed by Fred Johnson that Scopuli’s sole survivor, Julie – code name Lionel Polanski – might be able to reveal who truly destroyed the Canterbury. Consequently, Holden, Naomi, Alex, and Amos decide to stick together until they get answers.

In "Salvage", out in space, Holden and his crew find the Anubis at the coordinates provided by Julie (as Lionel Polanski). They realize the Anubis was the stealth ship that blew up the Canterbury, and is filled with a dangerous substance that must have killed the crew. The crew traces the Anubis’ shuttle to Eros, where they meet Josephus Miller and escape UN Undersecretary Sadavir Errinwright’s team of assassins. Later on, Julie's corpse is uncovered by Miller, Holden, and his crew.

In "Critical Mass", it is revealed that by carrying the infection to Eros, Julie unwittingly completed what Dresden began: the controlled experimental infection of the entire station. Dresden follows the trail to Julie's room at the Blue Falcon where he draws samples of the contagion to inject the populace with.

In "Leviathan Wakes", Miller sees a vision of Julie when she appears to ask him whether he had become the "ass" or the "boot", a reference to the story he just told Holden about Sematimba. He later hallucinates her again as Amos opens the hatch to the Rocinante to retrieve Miller and Holden.

In "Static", in Diogo's quarters, as Miller decides to embrace his Belter roots and shave the sides of his head, Julie appears in the mirror seemingly pleased with the former Star Helix detective.

In "Home", on Eros, Miller encounters a version of Julie Mao merged with the protomolecule. The Julie-protomolecule hybrid is revealed to be in control of Eros’ trajectory, and her subconscious has sent it hurtling towards Earth, where the impact could kill everyone on the planet. Miller provides comfort to the disoriented Julie and convinces her to guide Eros towards Venus instead. Miller dies alongside Julie, saving billions of lives and humanity as we know it.

In "Intransigence" Clarissa Mao flashes back to a memory of her walking into a room with Julie Mao and her father, Jules-Pierre Mao arguing. Later, Clarissa confronts her and argues with her about how Jules' treats their father.


Season One
1 "Dulcinea"Appears
2 "The Big Empty"Appears
3 "Remember the Cant"Appears
4 "CQB"Appears (archive footage only)
5 "Back to the Butcher"Absent (credit only)
6 "Rock Bottom"Absent (credit only)
7 "Windmills"Absent (credit only)
8 "Salvage"Appears (corpse only)
9 "Critical Mass"Appears
10 "Leviathan Wakes"Appears
Season Two
1 "Safe"Absent (credit only)
2 "Doors & Corners"Absent (credit only)
3 "Static"Appears
4 "Godspeed"Appears
5 "Home"Appears
6 "Paradigm Shift"Absent (credit only)
7 "The Seventh Man"Absent (credit only)
8 "Pyre"Absent (credit only)
9 "The Weeping Somnambulist"Absent (credit only)
10 "Cascade"Absent (credit only)
11 "Here There Be Dragons"Absent (credit only)
12 "The Monster and the Rocket"Absent (credit only)
13 "Caliban's War"Absent (credit only)
Season Three
1 "Fight or Flight"
2 "IFF"
3 "Assured Destruction"
4 "Reload"
5 "Triple Point"
6 "Immolation"
7 "Delta-V"
8 "It Reaches Out"
9 "Intransigence"Appears
10 "Dandelion Sky"
11 "Fallen World"
12 "Congregation"
13 "Abaddon's Gate"


  • She is the only known consciousness which managed to fight back and alter the protomolecule's behavior in its encounter in the Sol system.
  • According to her dating profile, Julie is 22 years old, vegan, single, with "orientation: pan" and rarely drinks.[1]
  • In the books, Julie is older than her sister Clarissa, while in the series they switched it to Clarissa being her older sister.
  • Julie helped rescue Belters during an unspecified accident and as a result the treatment would require her to take medication for the rest of her life as well as rendering her infertile.



See also[]


External links[]