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"
David Crystal difficult to spell. His companion book, "Making a Point: The Pernickety Story of English Punctuation" came out in 2015 from Profile Books (UK) and St. Martin's Press (USA). Crystal is a proponent of a new field of study, Internet linguistics, and has published "Language and the Internet" (2001) on the subject. Crystal's book "" (2008) focused on text language and its impact on society. From 2001 to 2006, Crystal served as the Chairman of Crystal Reference Systems Limited, a provider of reference content and Internet search and advertising technology. The company's iSense and Sitescreen products are based upon the patented