All of time and space... inside a little blue box? Step through TARDIS doors with Tyrell/@theoriesbyt and find out what 'bigger on the inside' really means! Subscribe to Doctor Who for more exclusive videos: http://bit.ly/SubscribeToDoctorWho WATCH MORE: Compilations: http://bit.ly/DWCompilations Regenerations: http://bit.ly/DWRegenerations Title Sequences: http://bit.ly/ALLTitleSequences MORE ABOUT DOCTOR WHO: Welcome to the Doctor Who Channel! Travel in the TARDIS with clips dating back to the Doctor's first incarnation in 1963, all the way through dozens of regenerations. Including behind-the-scenes footage, exclusive videos and our very own show Doctor Who: The Fan Show - this is the place to find all the best official clips. #DoctorWho This is a commercial channel from BBC Studios. Service information and feedback: https://www.bbcstudios.com/contact/contact-us/