Explorer
An explorer was someone who went to places about which little was known to learn more about them.
Captain Cook was an intergalactic explorer; dressed as one from the early 20th century although he lived in the 35th. (TV: The Greatest Show in the Galaxy)
Ulysses was a Time Lord explorer. (PROSE: The Gallifrey Chronicles)
The First Doctor, Ian, Barbara and Susan encountered Venetian trader and explorer Marco Polo on the Plain of Pamir in 1289. (TV: Marco Polo)
Professor Edward Travers helped the Second Doctor defeat the Great Intelligence. (TV: The Abominable Snowmen)
Ernest Shackleton met the Tenth Doctor and Martha Jones on an expedition in Antarctica, where they encountered the Skith. (COMIC: The First)
The Eleventh Doctor recruited Edwardian explorer John Riddell from 1902 to answer a 24th century distress call. (TV: Dinosaurs on a Spaceship)
Shalabar Scone was a legendary explorer on Lahn. (COMIC: The Spice Route)
An explorer once became trapped in a time loop after entering the Time Fracture. (PROSE: Hello And Congratulations!)
Prior to the Last Great Time War, the Unon were a race of explorers. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)