Following Laurie's death, Jamie was adopted by the Carruthers family and develops a close bond with her older foster sister, Rachel (Ellie Cornell).

When the police arrive, they tell Jamie to drop to the ground and open fire on Michael, sending him to fall down a mine shaft, which then collapses on top of him.

When screams are heard from upstairs, Dr. Samuel Loomis (Donald Pleasence) goes to investigate and finds Jamie wearing a clown costume and holding a pair of bloody scissors, similarly to Michael when he killed his older sister Judith.

She makes it to the local radio station, where she pleads for help (which is heard by Loomis and an adult Tommy Doyle (now played by Paul Rudd) and hides her baby, before being forced to run again when Michael finds her.

The Man in Black is later revealed to be Loomis' former medical colleague Dr. Terence Wynn (now played by Mitchell Ryan), who is the leader of a Druid-like cult.

It is also implied that Wynn has been trying and failing to breed the ultimate evil using Michael's DNA and female patients in in-vitro fertilization experiments; finally reaching a success with Jamie's baby.

[6] Patrick Bromley observed that incorporating children into horror franchise sequels "is usually the kiss of death" but that Jamie's inclusion in Halloween 4 revitalized the series.

[8] In his ranking of the final girls in the Halloween franchise, Jake Dee observed that Jamie “overcomes her past trauma and schoolyard bullying for being related to Michael Myers, only to have her homicidal uncle stalk her mercilessly and relentlessly”.

Dee notes the character overcoming her uncle's mental hold on her and “her own sense of evil” and cites this as making her one of Michael's strongest opponents.

[9] Princess Weekes of The Mary Sue writes that Jamie works as an effective protagonist due to the performance of Harris and "the fact that she as a child was being thrust into these terrible situations."

[10] David Crow of Den of Geek cites Jamie, as she is portrayed in Halloween 4 and Halloween 5, as an “especially rare type of final girl” due to being a child and complimented Harris as doing “pretty well for a child actress in this role, particularly in her second entry where her pantomime expressions (the terror of the fourth movie left her mute) allow her instant sympathy—a trait long lost in most horror movie heroines.”[11] A.A. Dowd of The A.V.

Club writes that Jamie and Rachel split the heroine role previously held by Laurie Strode as the pair of sisters "are stalked by Myers, who in turn is hunted by both a scarred, limping Loomis and a mob of trigger-happy hillbillies.

"[16] Spencer Whitworth writes that although it appears Michael has finally been vanquished, his wickedness "has survived, and it has passed to his innocent niece" and that "Jamie stands as an emotionless dead ringer of her uncle".

"[8] Devin Meenan of Comic Book Resources notes that Jamie's attack on her adoptive mother mirrors Michael's attack of Judith in the opening scene of the original Halloween due to both her clown costume resembling his and the point-of-view shot through her mask and that the conclusion showed "Michael is victorious even in death, for his evil has infected his family.

Girard believed removing Jamie's speaking ability would give her "a heavy punishment and a difficulty she had to overcome" in her journey to evolving into a hero.

"[22] Mark Ziobro opined that Jamie's connection with Tina and the performance of Harris are the best parts of Halloween 5, citing some of their scenes as adding "to the film in unique ways.

[25] After the 1982 release of Halloween III: Season of the Witch, the lowest performing film in the series at the time,[26] executive producer Moustapha Akkad wanted to make a sequel that brought back Michael Myers.

[29][30] McElroy came up with the idea of Brittany "Britti" Lloyd, Laurie Strode's daughter, to be chased by her uncle, who has escaped from Ridgemont after being in a coma for ten years.

[33] After reviewing the screenplay, director Othenin-Girard added Jamie's inability to speak to the draft, along with the supernatural plot device of her telepathic visions connected to Michael.

"[36] In June 1994, Farrands was hired to write a new screenplay, as the film had an impending shooting date scheduled for October in Salt Lake City, Utah.

The script by Farrands featured a secret society "made up of a lot of the people within the town of Haddonfield" who wanted to take Jamie's life as a final sacrifice.

Josh Stolberg, who also unsuccessfully proposed a Hellraiser crossover with Bobby Florsheim, pitched Halloween: Bad Blood, which would have brought back Jamie Lloyd.

She was always there, and she always wanted to do her own stunts.”[59] Harris sought to reprise the role for the sixth installment, now titled Halloween: The Curse of Michael Myers, but the producers and Dimension Films reportedly refused to pay her the $5,000 she requested, and she was not fond of the script.

Brandy had conversations with Daniel Farrands about John Carpenter and The Fog and recalled "knowing I was stepping into a part that people were so attached to with another actor, and that’s not easy".

[62] Brandy described the cast as being "pretty bummed about the reshoots" and believed it was possible for someone to easily recognize which scenes were added later, citing their lack of lighting and depth.

Brandy preferred the original because "it was unnatural to have that line they gave me in the barn and it felt really forced, with blades going through my stomach", though she admitted to understanding the altered scene's appeal for its gore and special effects.

[70] Jack Wilhelmi observed, "Like it or not, Jamie’s inclusion in the franchise brought a tremendous amount of depth and characterization to staples like Dr. Loomis and Michael Myers, giving them a foil to build off of and play against.

[78][79] Adam Tyner lauded Harris as "once again exceptional in the lead role, contributing a soulful and intense performance that few actors of any age could hope to rival.

[89] The decision to not have Jamie as the antagonist in subsequent installments has been received negatively, as Michael Tatlock opined that carrying on from the ending of Halloween 4 "would’ve brought the series into a new and more interesting path.

"[92] Jamie's role in The Curse of Michael Myers has also been criticized, with Tyler opining that the movie "did no justice to the character (and the whole 'artificial insemination' part of it was disgusting and disrespectful)".