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General

"I know you're witness X"

Sonia was the wealthy but self-made dynamo behind a  cosmetics empire that was owned and run by her late husband, Geoffrey Stevens. Then Geoffrey disappeared. As far as the world knows, Geoffrey is suspected of suicide after a devastating cancer diagnosis. When Sonia’s best friend Helen Masters also goes missing, the police are suspicious and have gathered enough circumstantial evidence to charge her with murder.

Liz Birdsworth is put up to the task to retrieve evidence finding out clue's to try and make Liz look good with Vera and the police, but Sonia declines any information coming forth.

While cutting Maxine's hair, she delivers a cryptic message that she may have had something to do with the murder (referring to cutting hair as taking a crown away).

Initially friendly towards the crew, things get rocky between them after Sonia discovers that "Witness X" is an inmate which causes her to speculate Maxine (Though, she knew the entire time that it was Liz Birdsworth)

Sonia is also a victim of Lucy Gambaro (Juice) as she is bashed in the showers after Lucy tried to convince her to donate money to her and the 'boys', which she ultimately fails and then demonstrates why she needs their protection. Sonia is temporarily confined to a wheelchair as a result of this with torn ankle ligaments and a torn ACL.

When evidence towards Sonia is tainted due to Liz's perjury and Don Kaplan's failure to investigate the matter properly, Sonia is released from prison and Liz is charged with perjury.  When Don tries to manipulate Sonia into giving him more money, Sonia drugs him and puts him in the car to kill him in the middle of nowhere, but Don wakes up and escapes in Sonia's car, Sonia manages to get back into town where she is arrested attempting to run. Sonia is returned to Wentworth, and Don flees the country. Sonia gets drugged by Liz and Sonia suffers a cardiac arrest in the dining room, Boomer is charged with attempted murder.

When Sonia returns from the hospital she is informed that Boomer has been charged with attempted murder but tells Governor Bennett that it was a misguided suicide attempt. Sonia also gets the greenwall project up and running again but in the process manages to kill Sharon Gilmour (Wentworth)  in a case of mistaken identity. Sonia later in a radio interview tells the press and inadvertently the entire prison that Liz was Witness X, Vera shuts down the press conference and Sonia takes Liz to the yard where Liz is pelted with grass and dirt.

In a final confrontation with Liz Birdsworth, Sonia is pushed over the ledge of the roof by Kaz Proctor, falling to her death.

Sonia serves as the secondary antagonist of Season 4 and Season 5 as well as the main antagonist of the first half of Season 6.

Sonia is mentioned twice in season 7, once when Kosta is threatened by Kaz to stop bringing drugs in or she will make Kosta "Fly like I made Sonia." and in passing by Will and Miller when Kaz undergoes therapy.

Notes Edit

  • Sigrid Thornton appeared on the original Prisoner as Ros Coulson
  • Sigrid is one of five actors who appeared in both Prisoner and Wentworth. The other four are Anne Charleston, Alex Menglet, Debra Lawrence and Stefan Dennis.
  • Sonia is similar in some ways to Ros, both were convicted of murder (Albeit under different circumstances) and both are shown to be highly intelligent.
  • Sonia is very different to her original series counterpart, the original Sonia Stevens was a drug dealer who specialized in fleecing and supplying prostitutes.
Wentworth: Season 4
"First Blood"
Absent
"Poking Spiders"

Absent
"Prisoner"


Absent
"Screw Lover"

Absent
"Love and Hate"
Absent
"Divide and Conquer"

Appears
"Panic Button"


Appears
"Plan Bea"

Appears
"After Life"
Appears
"Smitten"


Appears
"The Eleventh Hour"
Appears
"Seeing Red"

Appears
Wentworth: Season 5
"Scars"
Appears
"The Bitch is Back"

Appears
"Nothing but the Truth"


Appears
"Loose Ends"

Appears
"Belly of the Beast"
Appears
"Happy Birthday, Vera"

Appears
"The Pact"


Appears
"Think Inside the Box"

Appears
"Snake Head"
Appears
"Mere Anarchy"


Appears
"Coup de Grace"
Appears
"Hell Bent"

Appears
Wentworth: Season 6
"Clean Slate"
Mentioned
"The Boxer"

Appears
"Bleed Out"


Appears
"Winter Is Here"

Appears
"Bitter Pill"
Appears
"The Angel of Wentworth"

Appears
"The Edge"


Appears
"Lovers and Fighters"

Mentioned
"Shallow Grave"
Absent
"Fractured"


Mentioned
"Indelible Ink"
Absent
"Showdown"

Absent

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