Nicholas Garrigan is a fictional character from the novel "The Last King of Scotland" by Giles Foden. He is a young Scottish doctor who travels to Uganda in the 1970s to work in a rural hospital. Garrigan becomes involved with the political turmoil of the time, particularly with the controversial leader Idi Amin. As he becomes Amin's personal physician, Garrigan experiences the complexities of power and corruption. His character serves as a lens through which readers can explore the impact of colonialism and the moral dilemmas faced by individuals in positions of influence during a turbulent period in Ugandan history.