There are at least two artists with the name Captain. [1] A rock band from London.
[2] Markus Kaarlonen's handle in the Amiga scene.
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[1] Captain are an English band from London, UK, who formed in early 2005. They perform a range of alternative pop songs, getting their musical influences from groups such as the Smashing Pumpkins, The Beach Boys, My Bloody Valentine and The Cure.

Read more about Captain on Last.fm.