Jennifer Fitz
Jennifer Fitzsimmons
Biographical information
Birthplace: United States
Birthdate: 1984
Status: Deceased
Manner of Death: Mysterious respiratory illness
Died: 2014
Age: 28
Residence: United States
Occupation: High school teacher
Swim coach
Other information
Gender: Female
Hair color: Brown
Eye color: Brown
Height: 5'4"
Monitor: Greg (boyfriend)
Marital status: In a relationship with Greg
Significant Other/s: Greg (boyfriend)
Family: Leda clones (sisters/genetic identicals)

Castor clones (genetic brothers)
Kendall Malone (sister/genetic template)
Kira Manning (genetic niece; via Sarah)
Siobhan Sadler (genetic niece; via Kendall)

Series information
Portrayed by: Tatiana Maslany
Season/s: 2
Only appearance: "Mingling Its Own Nature With It"
"Dr. Leekie said that he could help. But he lied...I'm gonna die here."
—Presumably Jennifer's last words, directly indicting Dr. Aldous Leekie with her death.[src]

Jennifer Fitzsimmons was a 28-year old high school teacher and swim coach. She was among the clones seemingly affected by the same respiratory illness that struck Katja Obinger and Cosima Niehaus.

Her appearance in "Mingling Its Own Nature With It" is seen only through a series of video diaries, possibly suggested by the Dyad Institute, chronicling her declining health from the first day of the diagnosis that unidentified polyps were discovered on her lungs to possibly her last day in a hospital. According to Delphine Cormier, Jennifer was the first clone to show symptoms, six months before Katja. Three days after Jennifer died, Delphine provided these videos to Cosima, who patiently listened to her fellow clone's introspection, heightening Cosima's awareness of her mortality and thus her mental strain.

In the videos, Jennifer revealed that she was contacted, offered treatment, and flown to the Dyad Institute as courtesy of Dr. Leekie, with the accompaniment of her boyfriend and monitor, Greg. At the Institute, Jennifer was supposedly given a new treatment each week, but no avail. Her health drastically kept deteriorating to the point that she could not digest food properly, was coughing up pus and could not even breathe. Cosima criticized Jennifer's 'fake hope' and harshly attributed that fact to her monitor as he kept her "completely in the dark", making Jennifer naïve of her own illness, her existence as a clone and of her monitor. However, Delphine claimed that Jennifer's naïvety did not compromise her treatments. Near the end of her supposed last diary entry, Jennifer boldly stated that Dr. Leekie has outright lied to her and that she will eventually die.


The Institute's "treatments" have led Jennifer to lose her hair.

Jennifer's body was later autopsied by both Delphine and Cosima in hope of finding the source and possible cure of the illness that plagued her, Katja and its newest victim, Cosima. Eventually it was discovered that the illness was auto-immune as more mature and pronounced growths were found on Jennifer's uterine wall, indicating that the illness originated there and spread throughout Jennifer's body. This led Cosima to conclude that the illness was a plausible cause for Jennifer's infertility.

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