Companion (Doctor Who) "Face the Raven", but in a subsequent episode ("Hell Bent") her time stream is frozen at the moment of death by the Time Lords so that they can interrogate her about the Hybrid; the Doctor takes advantage of this to save her life, but she remains technically neither alive nor dead, does not age or have a pulse. After her departure as a companion of the Twelfth Doctor, she teams with the immortal Ashildr and travels in a stolen TARDIS. Other companions died in alternate timelines or alternate lives. "Brigade Leader" Alistair Lethbridge-Stewart, "Section Leader" Liz Shaw, and "Platoon Leader"
Companion (caregiving) Companion (caregiving) In health care and caregiving, a companion, sitter, or private duty may be a nursing assistant or similar professional who is hired to work with one patient (or occasionally two). Companions may be hired to work in a variety of settings, including nursing homes, assisted living facilities, hospitals, and private homes, and their duties range from advanced medical care to simple companionship and observation. In hospitals, sitters are hired by the hospital for patients who cannot remain unsupervised for even a short period of time. These include patients who are at risk for injury to themselves or others