The plain-spoken human housekeeper who looks after Professor Data's house at Cambridge in the future seen in All Good Things.
Jessel is a human woman who appears in the final episode, All Good Things, played by Pamela Kosh.
In the future part of the story, Data holds the Lucasian Chair of mathematics at Cambridge University and lives in a large house full of cats. Jessel keeps the house for him. She lets Picard and Geordi La Forge in when they call, and makes it plain that she thinks little of her employer's habits.
Her chief complaint is the streak of grey that Data has put in his hair to look more distinguished. She tells the visitors it makes him look like a skunk, and asks them to get him to change it. She serves tea while Picard explains his fear of an anomaly in the Devron system, and Data agrees to help him look into it.