Reason #2: this will be the 108th hour of Lost since the show first began airing in fall of 2004.
With 23 being one of "the numbers" and 108 being the sum of the numbers, good money is on tonight's episode - titled "Lighthouse" - will wind up being rather monumental. Many keen Lost fans noted that last week's "The Substitute" aired on the eve of Ash Wednesday.
Lost at 9 tonight. Expect the usual post-episode reaction and thoughts afterward on this space :-)