Don't want to give too much away as it will spoil it for you - imagine how tonight's episode would have been if you had known that Michael shoots them?! I can say though that I'm pretty sure they're both dead, if not, burying them was a bad idea!
I'll also say that by the end of this series, you'll be left asking a lot of questions and DESPERATE for the next series. I'll also say, that during the last episode, you find out what happens if the numbers aren't put in, three main characters are left captured by the Others and two get to leave the Island and escape.
There you go. Some spoilers but nothing spoilt, hopefully x