Viking

The Vikings were Scandinavian seafarers, warriors and traders who plundered Europe from the late 8th to late 11th centuries. They also explored and colonised, reaching as far as Iceland, Greenland and even Canada. (PROSE: A History of Humankind)

Culture
Viking culture was predominantly focussed on the concept of honour - the Twelfth Doctor said that dying with honour, as opposed to without, made "all the difference in the world" to Vikings. In a similar vein, a typical Viking would rather die fighting than live as a coward. (TV: The Girl Who Died) There existed a Viking code, which held that the captain of a ship could never be disobeyed under any circumstances. (COMIC: Dr. Who's Time Tales)

Being the only widely known representatives of their people, the Viking moniker became synonymous with Nordic culture as a whole. (TV: The Curse of Fenric) Vikings spoke Old Norse. (PROSE: The Spear of Destiny) The TARDIS wardrobe included Viking clothing. A Viking outfit was among the choices considered by the Fourth Doctor for his new outfit just after his regeneration. (TV: Robot)

The Vikings worshipped many gods and goddesses. The three most important gods were Odin, Freyr and Thor. (PROSE: A History of Humankind)

History
During the 9th century, a group of Vikings stole the flask containing Fenric, taking it to Northumberland and Maiden's Point. They buried the flask beneath St Jude's Church, leaving a runic inscription warning that the flask was cursed. Their descendants settled the area. Among the Vikings were Asmund, Rognvald, Torkel and Halfdan. (TV: The Curse of Fenric)

Also during this century, the Twelfth Doctor and Clara Oswald were captured by a Viking raiding party and taken to their village. Shortly afterwards, the village was visited by the Mire, whose leader appeared in the form of Odin to invite the Vikings to dine with him in Valhalla. In reality, the warriors of the village were captured and taken to the Mire's ship, where they were liquefied for sustenance. (TV: The Girl Who Died)

At an unknown point, Gundar's crew rebelled against him. In retaliation, he cursed them before committing suicide. The cursed crew were shipwrecked on an "unknown isle" and frozen at their current ages, unable to escape even through death, until a descendant of Gundar was shipwrecked there as well and wished them free. As the curse dissipated, they were returned to the era they originally came from. (COMIC: Dr. Who's Time Tales 37'')

The crew of a Viking ship were among the people who glimpsed Von Richter's time machine as it hurtled through historical eras, visible as a streak of light in the sky. They thought it an "omen" that their gods "view[ed their] voyage with favour". (COMIC: Dr. Who's Time Tales 43)

A Talessh was defeated and buried in Arizona by Vikings. (AUDIO: Shield of the Jötunn)

The Varangians were 9th century Russian Vikings. Kate Wilson believed that they sounded like something out of Star Trek. (AUDIO: The Conspiracy)

In 1006, there was a Viking presence in Ireland, with the Norseman King Sitric Silkbeard ruling over Dublin. (AUDIO: The Book of Kells)

In 1066, the Monk planned to sabotage a Viking raid in order to ensure King Harold Godwinson's victory at the Battle of Hastings, but was prevented from doing so when a group of Saxons ran the Monk out of his monastery. (TV: The Time Meddler)