Um, wow. I don't often find myself speechless after an episode of most television series but after last night's installment of Lost ("The Constant"), I had to sleep on it before I could gather my thoughts together. In a brilliant episode linked thematically and narratively with last season's groundbreaking Desmond-centric episode "Flashes Before Your Eyes," we got a few answers to some looming questions and were posed a few new queries as well. Like its predecessor, "The Constant" didn't actually feature any flashbacks or flash-forwards, instead showing the effects of poor Des getting "unstuck" from time (to borrow the phrase used by the past-tense Daniel Faraday and "Slaughterhouse Five"). The episode picks up from when we last saw Sayid and Desmond, as they boarded the helicopter bound for the mysterious freighter. Frank, under strict instructions from Faraday, is told to fly directly along the same vector as when the