After the Sun destroyed Earth, humanity moved to New Earth, which is where the Doctor and Rose go.[N 1] They enter a posh hospital in New York, where Rose runs across Cassandra, the antagonist, once more. Rose’s body is in Cassandra’s possession since she needs one. In order for the Sisters of Plenitude to find their treatments, the Doctor and Cassandra learn that the hospital houses hundreds of artificially made people who have contracted various illnesses. As a diversion, Cassandra lets go of a few of the humans, but they let go of others, and an attack akin to a zombie outbreak starts. In order to cure the diseased folks, the doctor uses a disinfectant shower to spray them with an intravenous solution. Cassandra transfers her consciousness to her servant Chip after the Doctor tells her to leave Rose, but Chip’s cloned body fails, and Cassandra accepts her death.