Boswell Boliver

Boswell Boliver was a scientist whose "time tale" became known to the Fourth Doctor.

Biography
Boliver spent his life working on time travel. He was widely derided by his colleagues, and came to loathe the feeling of being laughed at with a white-hot passion. After successfully building a time machine, he resolved to transport himself back in time permanently, carrying with him inventions of the modern world, so that he could forever after live as a subject of awed admiration from the denizens of the past.

Instead, Boliver ended up materialising in the middle of a jousting competition held at tbe behest of a King, and thrown into a dungeon for three days. When he was finally granted an audience, his demonstrations all failed, due to the lighter being out of fuel, a guard breaking his camera before he could use it to take a picture of the King, and his radio being useless without any radio stations to pick up.

Boliver was to be executed, but the Queen, finding his desperate flailing and unfulfilled pretences of genius amusing, convinced the King to let him live as their new court jester. (COMIC: Dr. Who's Time Tales)