We don't know his real name. We don't know who he was before he stole the TARDIS -- a spaceship/time machine that looks like a police box on the outside, but is really a cavernous ship on the inside. He's thousands of years old, but wears a different face every few years. He calls himself The Doctor, but Doctor who? In the first of my three-part series, I look at how a restless intergalactic time traveller became a global pop culture icon, and why The Doctor's knack for physical regeneration resonates with fans on a more personal level. Featuring Andy Heidel, Nick Randell, Robin Bunce, Mac Rogers, Emily Asher-Perrin, Riley Silverman and Kelsey Jefferson Barrett. Learn more about your ad choices. Visit megaphone.fm/adchoices