Fionnula Flanagan's scene-stealing guest spot on the "Flashes Before Your Eyes" episode of Lost got me thinking about some of the other memorable guest stars the show has had over the years. It was difficult to commit to only five performances, with so many to choose from. Below are my picks for the most entertaining guest roles over the last three seasons.

1. Clancy Brown ("One of Them"; "Live Together, Die Alone"): This actor owns every role he plays, from Brother Justin in Carnivale to Byron Hadley in The Shawshank Redemption, so it was no surprise when Clancy Brown rocked both Sayid's and Desmond's flashbacks. It is still unclear if Joe Inman and Kelvin Inman are the same person, but at least one of them has a major role in the history of the DHARMA hatch. Here's hoping that Inman's (and Brown's) part in the Lost story continues in the future.