Dr. Who

Dr. Who is a human scientist who invented a time machine called Tardis.

Live Shows
Dr. Who was one of a group of largely extra-canonical Doctors sent to a Babylon 5 convention in February, 2019 to collect segments of an alien artifact.

Behind the Scenes

 * This is, of course, the version of the Doctor played by Peter Cushing in the two theatrical movies Dr. Who and the Daleks and Daleks: Invasion Earth 2150 A.D..
 * Michael Nixon frequently does his faux-Cushing voice in the podcast itself.