Question: Samantha Munro was cast as which actress/producer, known for her role as Prue Halliwell in "Charmed"?

Context paragraphs:
All Hell Breaks Loose (Charmed): "All Hell Breaks Loose" is the twenty-second episode and season finale of the third season of the American television series "Charmed"; it is also the 66th overall episode in the series.  The episode was originally broadcast in the United States on May 17, 2001 on The WB.  It was written by Brad Kern and directed by Shannen Doherty.  As well as being Doherty's last episode as director, it was also her last appearance on the show as the character Prue Halliwell, although the character would later return in the .  In the episode, The Charmed Ones deal with their secret of being witches going global and all of the news reporters swarming them.

List of Charmed characters: "Charmed" is an American television series that was originally broadcast by The WB for eight seasons from October 7, 1998, until May 21, 2006.  The series narrative follows a trio of sisters, known as The Charmed Ones, the most powerful good witches of all time, who use their combine Power of Three to protect innocent lives from evil beings such as demons and warlocks.  Each sister possesses unique magical powers that grow and evolve, while they attempt to maintain normal lives in modern-day San Francisco.  The main characters of the first three seasons were Prue (Shannen Doherty), Piper (Holly Marie Combs) and Phoebe Halliwell (Alyssa Milano).  After Doherty departed from the series in 2001, resulting in her character's death, she was replaced by Rose McGowan as the long-lost younger half-sister Paige Matthews from the fourth season onwards.  The following list only contains characters that appeared in five or more episodes.

Kyra (Charmed): Kyra, formerly known by her title the Seer, is a fictional character from the American television supernatural drama "Charmed", which aired on The WB Television Network (The WB) from 1998 to 2006.  The character was created by executive producer Brad Kern and portrayed by actress Charisma Carpenter.  Carpenter was invited on the show after acting with "Charmed" cast member Holly Marie Combs on the ABC Family television film "See Jane Date" (2003).  The actress' original contract was a guest star role that included three episodes in season seven, with media outlets reporting the possibility of Carpenter becoming a series regular.

Paige Matthews: Paige Matthews is a fictional character from the American television series "Charmed", played by Rose McGowan from October 4, 2001 until May 21, 2006.  The character was created by executive producer Brad Kern as a replacement for lead character Prue Halliwell, following the departure of actress Shannen Doherty.  Paige is introduced in season four as the fiercely independent younger half-sister of the show's remaining female leads, sisters Piper (Holly Marie Combs) and Phoebe Halliwell (Alyssa Milano).  Like her sisters, Paige is a witch, and more specifically, one of the "Charmed Ones"—three of the most powerful witches of all time.  Paige is introduced as the secret love child of the Halliwell sisters' mother Patty (Finola Hughes) and her "whitelighter" (guardian angel) Sam Wilder (Scott Jaeck), making Paige both a witch and whitelighter.  She was given up at birth and raised by her adoptive parents.

Samantha Munro: Samantha Munro (born October 19, 1990 ) is a Canadian actress.  She is best known for her role as Anya MacPherson on "".  In 2015, Munro was cast in the role of Shannen Doherty/Brenda Walsh in Lifetime's "The Unauthorized Beverly Hills, 90210 Story".

Holly Marie Combs: Holly Marie Combs (born December 3, 1973) is an American actress and television producer.  She is known for her roles as Kimberly Brock in the CBS series "Picket Fences" (1992–1996), Piper Halliwell in The WB series "Charmed" (1998–2006) and Ella Montgomery in the Freeform series "Pretty Little Liars" (2010–2017).

Charmed: Charmed is an American television series created by Constance M. Burge and produced by Aaron Spelling and his production company Spelling Television, with Brad Kern serving as showrunner.  The series was originally broadcast by The WB for eight seasons from October 7, 1998, until May 21, 2006.  The series narrative follows a trio of sisters, known as The Charmed Ones, the most powerful good witches of all time, who use their combined "Power of Three" to protect innocent lives from evil beings such as demons and warlocks.  Each sister possesses unique magical powers that grow and evolve, while they attempt to maintain normal lives in modern-day San Francisco.  Keeping their supernatural identities separate and secret from their ordinary lives often becomes a challenge for them, with the exposure of magic having far-reaching consequences on their various relationships and resulting in a number of police and FBI investigations throughout the series.  The series initially focuses on the three Halliwell sisters, Prue (Shannen Doherty), Piper (Holly Marie Combs) and Phoebe (Alyssa Milano).  However, following Prue's death in the third-season finale, their long-lost half sister Paige Matthews (Rose McGowan) assumes her place within the "Power of Three" from season four onwards.

Phoebe Halliwell: Phoebe Halliwell is a fictional character from the American television series "Charmed", played by Alyssa Milano from October 7, 1998 until May 21, 2006.  The character was originally played by Lori Rom in the unaired pilot episode.  However, Rom quit the series, and a new pilot was filmed with Milano in the role of Phoebe.  The character was created by Constance M. Burge and is based on Burge herself.  Phoebe is introduced into "Charmed" as the youngest sister to Prue (Shannen Doherty) and Piper Halliwell (Holly Marie Combs).  She is one of the original featured leads and, more specifically, a Charmed One – one of the most powerful witches of all time.  Phoebe initially possesses the power of premonition, which enables her to see into the future and the past.  To make up for initially only having a passive power, Phoebe develops martial arts skills in order to better assist her sisters when they fight evil beings.  As the series progresses, she also gains the active powers of levitation and empathy.

Shannen Doherty: Shannen Maria Doherty ( ; born April 12, 1971) is an American actress, producer, author, and television director.  She is known for her roles as Heather Duke in "Heathers" (1989), Brenda Walsh in "Beverly Hills, 90210" (1990–1994) and as Prue Halliwell in "Charmed" (1998–2001).

Wes Ramsey: Wesley Albert "Wes" Ramsey (born October 6, 1977) is an American actor.  He is perhaps best known for his performance in the romantic drama "Latter Days" and for his recurring role as Wyatt Halliwell on The WB supernatural drama "Charmed".

Supporting paragraphs: Samantha Munro Shannen Doherty
Answer: Shannen Doherty