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 (Doctor Who) in their youths by juvenile actors on "Doctor Who"; the pre-companionship lives of the Pond-Williams-Song family being particularly well-documented. Companions Jack Harkness and Sarah Jane Smith have also been depicted in their youths on their respective spin-off series. In addition to having been de-aged once in the classic era, John Benton was the first companion whose childhood was chronicled. A recurring theme of the new series is the toll the loss of companions takes on the Doctor. While he would more or less easily deal with his companions' departures in the classic series, the new series shows the Doctor having