Christopher Columbus

Christopher Columbus (1451-1506) was a Genoese navigator and explorer who, amongst other things, discovered America.

The Doctor had met Columbus at some point and acquired his business card. (TV: The Two Doctors) The Doctor travelled with Columbus on the Santa Maria, and suggested that Columbus plot his course with an orange and a biro, but Columbus didn't listen. (PROSE: Eye of Heaven)

Ian Chesterton called Vicki "Christopher Columbus" when she ran off on her own to explore the Sagarro Desert on the planet Aridius. (TV: The Chase)

When discussing how certain the Fourth Doctor was about Zeos being hidden, he asked, "How could Columbus be so sure?" Romana replied, "Who?" (TV: The Armageddon Factor)

Ace unfavourably compared Raphael to Christopher Columbus when he failed to realise her intention to explore Kirith's Harbours. (PROSE: Timewyrm: Apocalypse)