As well all know, 'Lost' is a difficult show to understand, even if you're a regular viewer. A couple dozen characters, various timelines, various locations all add up to a confusing (though great) show.

Wired has a handy character chart (yes, there might be spoilers!), created by bioinformics scientist Martin Krzywinski using Circos software (even that sentence is confusing) that shows how all of the characters are related. The chart showing the entire cast is just a mess of colored lines that might be hard to follow, but you can use the list on the left to narrow down the list of characters and plot points you want to examine.