DON'T BLINK! Relive the terrifying cliffhanger from 'Once, Upon Time' 👀 Find out where to watch #DoctorWhoFlux here ➡️ http://doctorwho.tv/watch WATCH MORE: Doctor Who: Flux: https://bit.ly/DW-FluxTrailers Series 12 Challenges: https://bit.ly/DWS12Challenges Subscribe to Doctor Who for more exclusive videos: https://bbc.in/SubscribeToDoctorWho MORE ABOUT DOCTOR WHO: Welcome to the Doctor Who Channel! Step inside the TARDIS and embark on an epic journey through time and space. From the Doctor's first adventure in 1963 through countless regenerations, here you will find iconic moments, behind the scenes footage, exclusive content and more! This is the ultimate destination for all things from the Whoniverse. #DoctorWho This is a commercial channel from BBC Studios. Service information and feedback: https://www.bbcstudios.com/contact/contact-us/