TARDIS

    The TARDIS (aka, Time and Relative Dimension in Space), is a time machine the Doctor uses to travel through time with his companion. A triumph of Time Lord temporal engineering, TARDISes are "dimensionally transcendental" which means that the interior and exterior exist in different dimensions and they can change both their external appearance and internal layout. When the Doctor decided to flee Gallifrey and roam the universe, he stole a TARDIS awaiting servicing for a variety of malfunctions and faults. He has never been able to fully repair it, making his travels often erratic and uncontrolled.

A Good Man?

    Although there is a new face in the TARDIS, the latest version of  the Doctor is still the bravest man in the universe. He uses brain over brawn, proudly defends the Earth, lives life with a passion, and never hides his anger when he sees the suffering of others. The Twelfth Doctor is still the man monsters have nightmares about. Perhaps more tinged by war and sadness than before, this new incarnation is particularly concerned with whether his reputation is as a good man or a bad one.

Photo from: The Doctor Who Site

River Song: Non-Time Lord Regeneration

     It's not just Time Lords that can regenerate. In certain obscure circumstances, such as exposure to energies from the TARDIS, others can absorb Time Lord abilities. The Doctor is delighted to discover that River Song, conceived in the TARDIS, can regenerate just like a Time Lord.

Photo from: WhatCulture.com

Regeneration

    In cases of advanced age, mortal illness, or fatal injury, Time Lords have the ability to regenerate their bodies to create a new physical form. There is a notable shift in personality too, due to chemical changes in the brain. The regeneration process takes many hours. It is hugely traumatic and can cause mental and psychological instability until it is completed.

                                                                                                   

Photo from: TARDIS Wikia

Growing Old

      Despite their regenerative powers, Time Lords cannot fight old age forever. After spending hundreds of years defending the planet Trenzalore from alien armies, the Eleventh Doctor becomes wrinkled and gray. He knows that he has used up all his available regenerations and that, this time, death will be final - or so he thinks.


      Having moments before believed he was facing certain death, and being willing to die for the people of Trenzalore, the Doctor welcomes this unexpected gift from the remaining Time Lords.        


      It is a faithful companion Clara who appeals to the Time Lords to save the dying, aged Eleventh Doctor. They give him another lifecycle and he uses the excess regeneration energy to destroy the Daleks invading Trenzalore.

photo taken by: redrocketrising.com

Mythical Hero

      The Doctor's appearances on Earth and services to humanity have gone down in legend and references to him are scattered throughout folklore. The "Man in the Blue Box" takes on an almost religious significance in this stained glass window from a London church.

Photo taken by: doctoraday.wordpress.com

Anatomy of the Doctor: Part 2

      Time Lords have two hearts and a binary vascular system, which enables them to survive major accidents and many physical and temporal shocks that would kill a human being. They also have a respiratory bypass system that enables them to survive without breathing for some time.

Photo taken by: BBC America

     A new version of the Doctor is created after a biological metacrisis combines genetic information from the Doctor's severed hand and from the human Donna Noble, with energy from an abortive regeneration. Although he looks like the Tenth Doctor, this half-Time Lord and half-human creation has only one heart and is unable to regenerate.