Question: King Duncan had a son who fled to which country after he murdered his father?

Context articles: Malcolm (Macbeth)
King Duncan
King Duncan (disambiguation)
Duncan I of Scotland
Inverness
David Thewlis
Sheep on Drugs
Pankaj Kapur
Donalbain (Macbeth)
Scorpion Mountain

Malcolm is a character in William Shakespeare's "Macbeth" (c. 1603–1607).
 The character is based on the historical king Malcolm III of Scotland, and is derived largely from the account in "Holinshed's Chronicles" (1587), a history of Britain.
 He is the elder son of King Duncan, the heir to the throne, and brother to Donalbain.
 In the end, he regains the throne after mustering support to overthrow Macbeth.
King Duncan is a fictional character in Shakespeare's "Macbeth."
 He is the father of two youthful sons (Malcolm and Donalbain), and the victim of a well-plotted regicide in a power grab by his trusted captain Macbeth.
 The origin of the character lies in a narrative of the historical Donnchad mac Crinain, King of Scots, in Raphael Holinshed's 1587 "The Chronicles of England, Scotland, and Ireland," a history of Britain familiar to Shakespeare and his contemporaries.
 Unlike Holinshed's incompetent King Duncan (who is credited in the narrative with a "feeble and slothful administration"), Shakespeare's King Duncan is crafted as a sensitive, insightful, and generous father-figure whose murder grieves Scotland and is accounted the cause of turmoil in the natural world.
King Duncan is a character in William Shakespeare's play "Macbeth".
Donnchad mac Crinain (Modern Gaelic: "Donnchadh mac Crìonain"; anglicised as Duncan I, and nicknamed An t-Ilgarach, "the Diseased" or "the Sick"; ca. 1001 – 14 August 1040) was king of Scotland ("Alba") from 1034 to 1040.
 He is the historical basis of the "King Duncan" in Shakespeare's play "Macbeth".
Inverness ( ; from the Scottish Gaelic: "Inbhir Nis" ] , meaning "Mouth of the River Ness") is a city in the Scottish Highlands.
 It is the administrative centre for the Highland council area, and is regarded as the capital of the Highlands.
 Inverness lies near two important battle sites: the 11th-century battle of Blàr nam Fèinne against Norway which took place on The Aird and the 18th-century Battle of Culloden which took place on Culloden Moor.
 It is the northernmost city in the United Kingdom and lies within the Great Glen (Gleann Mòr) at its north-eastern extremity where the River Ness enters the Moray Firth.
 At the latest, a settlement was established by the 6th century with the first royal charter being granted by Dabíd mac Maíl Choluim (King David I) in the 12th century.
 The Gaelic king Mac Bethad Mac Findláich (MacBeth) whose 11th-century killing of King Duncan was immortalised in Shakespeare's largely fictionalized play "Macbeth", held a castle within the city where he ruled as Mormaer of Moray and Ross.
David Thewlis (born David Wheeler; born 20 March 1963) is an English actor, director, screenwriter, and author.
 His most commercially successful role to date has been that of Remus Lupin in the "Harry Potter" film series.
 Other notable performances include the films "Naked" (for which he won the Best Actor award at Cannes Film Festival), "Dragonheart", "Kingdom of Heaven", "The Boy in the Striped Pyjamas", "The Theory of Everything", "Black Beauty", "Macbeth" (as King Duncan) and "Wonder Woman".
 He has also done voice work in the films "James and the Giant Peach" (1996), "The Miracle Maker" (2000), and "Anomalisa" (2015).
 Thewlis has combined major motion picture work with prominent television roles, including playing Cyrus Crabb in the television miniseries "Dinotopia" and antagonist V.M. Varga in the third season of "Fargo."
Sheep on Drugs are a British techno/dance-punk music group, formed by Duncan X (a.k.a. King Duncan) (vocals) and Lee Fraser (a.k.a. Dead Lee) (guitar/keyboards) and currently composed of Fraser and Johnny Borden (vocals/keyboards).
Pankaj Kapur is an Indian theatre, television and film actor from Ludhiana, Punjab, India.
 He has appeared in several television serials and films.
 His most acclaimed film roles to date have been that of Inspector P.K. in "Raakh" (1989), Dr. Dipankar Roy in "Ek Doctor Ki Maut" (1991) and Abba ji, (based on Shakespeare's King Duncan) in Vishal Bhardwaj's adaptation of "Macbeth"; Maqbool (2003), all three roles which got him National Film Awards.
Donalbain is a character in William Shakespeare's "Macbeth" (c. 1603–1607).
 He is the younger son of King Duncan and brother to Malcolm, the heir to the throne.
 Donalbain flees to Ireland after the murder of his father for refuge.
Scorpion Mountain is the fifth instalment in the "Brotherband" novel series by Australian author John Flanagan.
 It was released on 2 December 2014 in the United States.
 There is an attempt on Princess Cassandra's life and King Duncan calls for the Heron Brotherband (who are serving as the duty ship to Araluen) to help track down the mysterious plotters thought to be the Scorpion Cult.