‘O Captain! My Captain’ is one of Walt Whitman’s most famous poems. Written in 1865, it is an extended metaphor poem about the death of Abraham Lincoln. Originally published in a pamphlet regarding the American Civil War, it was then added to the fourth edition of Leaves of Grass, a comprehensive collection of Whitman’s poetry in 1867. It has referenced in Dead Poets Society, Family Guy, Doctor Who and the Avengers Assemble TV series among many others.