So is the Doctor Immune to the Time Energy seeing has he put his hand into it?

If he is then why didnt he pull Rory away from the Time energy?

that flow of Energy that took rory..looks like the inside of the tardis..

when rose looked into the heart of the tardis is was almost the same only more golden with her.

Yip there is something very odd about that. Rang alarm bells straight away.

time travellers have been used to escape from it before, there is a part of me that thinks the Dr used the allready dead Rory to stall the crack thing while he and Amy escaped. Seems a bit harsh though

He didn't put his hand into the time energy, he put it into the crack.

Its still odd though, everyones else that gets near gets wiped out of existence, but the Dr can stick his bloody hand in and he's fine

The time energy seeps out of the crack. It hadn't started to do it at that point.

Complicated space-time events like the Doctor probably take a lot longer time to get devoured by the cracks. Rory was probably simple enough to get erased in a fraction of a second, but that wouldn't allow the dramatic effects with the tendrils.

Ok but how could the fish people travel throught the crack without being eaten by time energy?

I don't recall that they did. I think they fled it because of the destruction it was causing.

if the time energy seeps out of the crack then it must be waiting inside the crack to begin with and that is where the doctor put his hand into.

I'm sure they said they went through the crack to escape. Which seems odd, but i remember a line to that effect.

Prisoner Zero escaped through the crack, so perhaps when it is near to the origial even that caused it (the Wedding Day) that it is less powerfull, a small ripple in time compared to the large ripples eminating away from the central point?

They also said they sometimes saw different things in the cracks. Not all of them contained silence.

Let's say we open some worm-holes on the planet, all leading to different locations in the universe (or other universes). Some of them will lead into black holes, while others lead to other planets.

The cracks don't all lead to the same point in space/time, some lead to the end of the universe & some lead to various times & places i.e. amy's house, venice etc.

The cracks in the Byzantium and the Silurian city both led to the end of the universe, or to the time and place that caused it, at least (which is how the Doctor was able get a temporal fix on when and where it happened, and retrieved that 'object' that is implied to be involved in it). The other cracks that Zero and the fish-people passed through, were between points in the universe.

I see it this way - when you strike a piece of toughened glass with a hammer, the greatest concentration of cracks is around the point of impact. The cracks spread outwards from that point.

Thats quite a good image used there.

I just dont think its a complex as we all think. i think there will be simple logic behind whats happening which we will hopefully find out in the next few weeks.

I think it must depend on where the crack is opening up to. In FaS and CB the crack appeared to be opening up to the end of the universe. However, in EH, we saw the Atraxi on the other side. So I assume only when it opens up to the end of the universe would you be erased because there is nowhere to go on the other side. The fish people probably never came across a crack opening up to the end of the universe.

I think it's implied they did - the ones they described as containing only silence. But there were lots and lots of them, of both kinds.

So some of the Cracks are gateways to other planets and also other parts in time whethers its forwards or back.