Concerning Toruk's moving through zombies
Bottom line: if Toruk is willing to risk the AoO's he can move past. Given that they are zombies he'll probably be okay. It's too bad Paldon didn't heed Collan's advice when he said:
Ducking behind Paldon as he rushes the room, Collan whispers to him from behind his high collar, "If you can get to the orc, I will ensure that Pelor guides your blade true."
Paldon would have had a much easier time getting there than Toruk, for sure.
From various parts of the SRD:
Moving Through a Square: You can move through a square occupied by a
friendly character, unless you are charging. When you move through a square occupied by a friendly character, that character doesn’t provide you with cover.
You can’t move through a square occupied by an
opponent, unless the opponent is helpless. You can move through a square occupied by a helpless opponent without penalty.
Overrun: During your movement or as part of a charge, you can attempt to move through a square occupied by an opponent.
My Notes on Overrun Option: An overrun grants the opponent an AoO due to you moving into their square, and doesn't protect you from getting hit by the other zombie. However, it would allow Toruk to make two full movements to get to the cleric, if the zombie does not choose to block and if that is the desire. Most likely it will choose to block since it's dumb, and success in this situation isn't that much better than failure.
Tumbling: A
trained character can attempt to tumble through a square occupied by an opponent (see the Tumble skill).
Tumble: (DC 15) Tumble at one-half speed as part of normal movement, provoking no attacks of opportunity while doing so. Failure means you provoke attacks of opportunity normally. Check separately for each opponent you move past, in the order in which you pass them (player’s choice of order in case of a tie). Each additional enemy after the first adds +2 to the Tumble DC.
My Notes on Tumble Option: Toruk can't attempt to tumble if he has no ranks in the skill (but it would be worth double-checking the houserules, since this is usually one of the first limitations to go for some people).
If Toruk were to move to Q13 then R12 he doesn't have to overrun a zombie. It would require a DC 15 Tumble check for the first zombie (despite there being multiple opportunities for that zombie to get an AoO during this movement, it's just one roll) and a DC 17 Tumble check for the second. This would allow him to move, at half movement, to S11, at which point he can continue moving forward at full speed with a second move action, or choose to move somewhere other than S11 in order to flank and attack zombies. Since the risk here is to either get attacked with an AoO or not, with no interferance with the desired movement, this would be the best option.
