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"
Doctor Who – The Companion Chronicles mini-series, and then in July 2008 releases became monthly. The monthly series of Companion Chronicles ended in June 2014 but the range will continue with box set releases. <section begin=series1 /><section end=series1 /> <section begin=series2 /><section end=series2 /> <section begin=series3 /><section end=series3 /> <section begin=series4 /><section end=series4 /> <section begin=series5 /><section end=series5 /> <section begin=specials /><section end=specials /> <section begin=series6 /><section end=series6 /> <section begin=special2012 /><section end=special2012 /> <section begin=series7 /><section end=series7 /> <section begin=series8 /><section end=series8 /> <section begin=series9 /><section end=series9 /> <section begin=series10 /><section end=series10 /> <section begin=series11 /><section end=series11 /> <section begin=series12 /><section end=series12 /> <section begin=series13