Jatt

Sister Jatt was a member of the Sisters of Plenitude. She lived on New Earth in the city of New New York in 5,000,000,023. She monitored the experiments on the humans in the secret Intensive Care Unit beneath the Hospital on New Earth and worshipped the goddess Santori.

When the Tenth Doctor visited the hospital with Rose Tyler, Jatt escorted him through Ward 26, where he expressed doubts on the Sisterhood's abilities to cure the Duke of Manhattan's terminal Petrifold Regression disease. After the Doctor recognised the identity of his summoner as being the Face of Boe, Jatt left him in the care of Novice Hame. She later called away Matron Casp to Intensive Care to examine one of the human test-subjects which was showing signs of speech, which Jatt saw as possible proof of Sister Corvin's thesis regarding the migration of sentience. Casp suggested reviewing the hospital's brainstem policy and ordered the patient incinerated.

Jatt again joined Casp in Intensive Care when Cassandra O'Brien, having possessed Rose's body, triggered an alarm and attempted to hold the Sisters to ransom with her discovery of the hospital's secret. Throughout the confrontation with Cassandra and release of some patients, Jatt remained calm and slightly indifferent, preferring to use a small palm-held device while Casp "negotiated" with Cassandra. However, when all of the infectious patients were released, she finally lost her cool, exclaiming in disbelief and horror at their freedom. When one of the patients approached her, she started hissing and batting at it with her claws to deter it, but to no avail. As Jatt let out a final, agonised scream, the patient touched her face, spreading its numerous viruses into her immunity-free body and killing her. (TV: New Earth)

She was the cousin of Sister Jara. (AUDIO: The Cats of New Cairo)