John Locke is a fictional character played by Terry O'Quinn on the ABC television series Lost. He is named after the English philosopher of the same name. In 2007, O'Quinn won the Primetime Emmy Award for Outstanding Supporting Actor in a Drama Series for his portrayal of Locke.

Benjamin Linus is a fictional character portrayed by Michael Emerson on the ABC television series Lost. Ben was the leader of a group of island natives called the Others and was initially known as Henry Gale to the survivors of Oceanic Flight 815. He began as the main antagonist during the second and third seasons, but in subsequent seasons, becomes a morally ambiguous ally to the main characters. Other characters frequently describe him as loyal only to himself, though it is also often hinted that he may be driven by some higher purpose.