Help!!!

[mermaidrain.livejournal.com]

I missed last week's episode (I didn't know there was a new one on) and apparently it was very important set up for this next week's episode. I NEED to know what happened last week. I know it involved the ghost of that dead serial killer and I saw the first ep that had him involved in it. But I missed last weeks' ep!!!! And now Allison is going off the deep end next week?!?!?! ACK!!! HELP!!! Is there anyone who would be willing to give me a blow by blow of the plot? Because I can't download tv shows on my computer (it's old and retarded). And NBC's episode guide had a very brief, very vague description.

And is it true that this next week's episode is going to be the season finale? Already? Or is it just the part 2 of what happened last week. Either way, I need to get caught up. Please! Someone! Anyone!