Ottawa was the capital city of Canada. (TV: The Claws of Axos [+]Bob Baker and Dave Martin, Doctor Who season 8 (BBC1, 1971).)
Tobias Blackstone and his sister Kristianna lived in Ottawa. Their family, the last believers in Jolnir, had emigrated from Norway to Canada in 1897. (PROSE: Christmas in Toronto [+]Andrew Cartmel, Short Trips: Christmas Around the World (Short Trips short stories, Big Finish Productions, 2008).)
During the late 20th century, Ottawa was one of the capitals that Axonite was distributed to. (TV: The Claws of Axos [+]Bob Baker and Dave Martin, Doctor Who season 8 (BBC1, 1971).)
In the 21st century, due to its cold climate and northern latitude, the Ice Warriors sent their Seed Pods to Ottawa to create an atmosphere lethal to humans, but which the Ice Warriors could thrive in. This was foiled when the Second Doctor used the Weather Control Unit to destroy the pods with rain. (TV: The Seeds of Death [+]Brian Hayles, Doctor Who season 6 (BBC1, 1969).)