in order of rank:
5) Jimmy - now i believe he is just a distraction from the real killer. also, he wasn't on the boat where cousin ben was killed. and why would he wanna hurt his love, Abby? he wouldn't do that? but i hope his suspicious actions in the previous episodes are gonna be explained in the finale... i also want him and Abby to be a surviving couple in the end.
4) Danny. remember, i still had that dream of him being the killer. who knows? he could be. he was on the boat in ep 1.
3) Sully. he probably asked JW to kidnap Chloe for him, but the brave girl took her life.. tsk tsk tsk.... other than that, i dunno why he is # 3 here, but he was also on the boat.
2) Booth. i know, i know. even though the guy is dead as seen in ep 4, i still don't see how bleeding alot of blood in just the leg is led to death. personally, i think that the blood was fake, all splurting out from a bag attached to his leg, where he'd purposely shot himself. also, someone from YouTube commented that in one show/ book where H.I is heavily referenced from, the 2nd killer is a bespectacled guy who purposely faked his death. sounds like Booth right? Also, in "Whap" a.k.a the 1st ep, when Abby was with Henry's friends on the boat, Booth didn't seem to smile or even look at her, instead of that he gave her a stare. he also distanced himself away from the group for a while. also, Karim mentioned in a website that the finale would be shocking in the last two mins. so how about bringing Booth back from the "dead"? that seems shocking and good enough..... p.s: he dropped a bottle into the water on the boat...
1) Henry. he probably did it all, not because he'd be Wakefield's child, but also for revenge on Trish, for getting with Hunter, and also his "could - be obsession" with Abby. in ep 9, he ensured that he and abby would be searching for Madison, with Jimmy tagging along. also, in ep 11, where he instructed Jimmy and Trish to one area and he, Abby and Cal to another. there, Henry orders Cal to go find Chloe on his own. he probably wanted to spend as much time with Abby as he can. when Jimmy appeared in the church in the same ep, Henry looked kinda of displeased when Abby and Jimmy were embracing. he also did the same when Abby said, "It's Jimmy" in ep 10. in ep 8, where J.D is dying, it'd be Henry, cos that was a lot of blood on his hands and shirt, there's no way he couldn't have done it. of course, he was on the boat...
So it'd be the Old Flame ( even i am starting to doubt it), the College Buddy, the Best Man, even though "supposedly dead" , the Nerd or the Groom. or even worse, it'd be one of the girls too, from Trish to Shea to even Madison, cos she scares me. but i know it can't be Abby. but they were on the boat.JUST TWO MORE DAYS!!!!!!