why Lost season 4 is groundbreaking!!

                     LOST season 4 started on a promising trail given by its previous season, which is the breathtaking flashforward sequence which made us feel sorry for Jack but a great relief that our gang will be savely rescued and it hardly looked 2 episode away till we understand that things are still shady as they have always been on lost and we are in a middle of a dilemma of which others can we trust ....the new helicopter  ones or the old native ones which has benefitted most to the character of Benjamin Linus and he used this opportunity to full potential and in addition we have always stubborn but good hearted Jack,ever confused about the island-John Locke and a refreshing Hurley but the real heroes has to be the writers  and the way they have approached this highly atticipated season with innovative storytelling techniques like flashforward,flashbackward and the famous Desmond's time travel episode 'constant' and providing great character arc till the  fo