Nurse

Nurses were health care professionals generally subordinate to medical doctors. They were roughly divided into two categories. Some were surgical nurses, who actively assisted surgeons during invasive operations. Others were focused more on patient care in general hospitals or specialized facilities such as mental institutions, research laboratories or schools. Occasionally, individuals impersonated nurses, usually to enact a criminal plan or alien invasion.

Secondarily, "Nurse" was also a surname, likely only amongst English-speaking humans.

General hospital nurses

 * A nurse at Ashbridge Cottage Hospital who assisted Dr. Henderson in his care of the post-regenerative Third Doctor. (DW: Spearhead from Space)
 * The Sisters of Plenitude — including Matron Casp, Sister Jatt, Novice Hame, and Sister Corvin — a group of Catkind nurses, at least some of whom seemed to have functionality more akin to that of medical doctors. (DW: New Earth)
 * A nurse at an unnamed Cardiff hospital who opined that a heavily-aged Martha Jones would likely die. (TW: Dead Man Walking)

Surgical nurses

 * Curtis, Dr. Grace Holloway's surgical assistant in the unsuccessful operation on the Seventh Doctor. (DW: Doctor Who)
 * The nurse who implanted an info-spike into the brain of Adam Mitchell. (DW: The Long Game)

Civilian

 * Thomas Hector Schofield — or "Hex" — a nurse at St. Gart's Hospital, who became a companion of the Seventh Doctor. (BFA: The Harvest, et al)
 * Weeler, an emergency room nurse at Walker General Hospital, who assisted in the initial examination of the Seventh Doctor, following gunshot wounds. (DW: Doctor Who)
 * A senior and A&E nurse in an unnamed Cardiff hospital who attended victims of the Night Travellers. (DW: From Out of the Rain)

Military

 * Lady Jennifer Buckingham, a British nurse and ambulance driver during World War I. (DW: The War Games)

At non-medical institutions

 * A nurse for The Company on Pluto who announced Cordo's father's death. (DW: The Sun Makers)
 * Joan Redfern, a nurse at Farringham School for Boys, who met John Smith — and the Tenth Doctor — in 1913. (DW: Human Nature)

At research institutions

 * Marius' nurse and the reception nurse at the Bi-Al Foundation. (DW: The Invisible Enemy)
 * Plummer, a practical assistant to Dr. Aaron Copley (TW: Reset)
 * Miss Foster, a neo-natal nurse, posing as the head of a commercial pharmaceutical company. (DW: Partners in Crime)

False nurses

 * The Deffry Vale High School nurse, who was in fact a Krillitane. (DW: School Reunion)
 * Lythia, a shape-changed impostor at Hippocrates Base. (DWM: Sins of the Fathers)

As surname

 * Rebecca and Francis Nurse, two Massachusetts citizens involved in the witchcraft trials of the 17th century, whom the First Doctor, Ian, Barbara and Susan met. (PDA: The Witch Hunters)