LOST ? tv show?

Hi everyone , I'm a big fan of Lost ... anyways ill get to the point and ask you : What do you believe , In the last episode from season 3 ... did Jack actually got back saved "his people" and now he desperately seeks to get back on the island . And who the heck died .. and no one came to his funeral. One more thing why did Jack told his "boss" ... the black dude from the hospital to bring his father down and if he is drunker then Jack he can fire him.From what i know his father died before he got on the island so that doesn't make any sense... please feel free to post what you think and your theories ... ill be glad to hear em out.

Look i watched all the 3 seasons...i have my own theories but im not 100% there are true i just wanted to see other people opinion next time just try to answer or don't post at all

For some reason when Jack's escaped the island, he wants to go back, but Kate doesnt. We dont know who was the one in the casket, but its someone Jack cares about in the future and Kate doesnt.
I think Jack saying "bring my father down here" was just a sign of his mental instability. His father was dead before the plane crashed.

well then you obviously need to watch all the series 1-3 then you'll understand!!

I just think that Jack was i lil' crazy from the drugs and drink, but also i heard that John Terry (plays Christian Shephard) is going to be in more seasons, whether thats more flashbacks or flashforwards i don't know. I also think it's only one of possible futures that depend on what he does on the island.
Also, i don't think we've met the person who was dead yet, there are going to be tons of new characters next season so it's probably one of them