Fullmetal Alchemist 28

It's time for Uninhabited Island Survive with Ed and Al! Their sensei has taken them to an island to spend a month to think over things, just as she did before she took them in as apprentices. Lots of flashbacks this time interwoven with current goings-on. The island is supposed to be uninhabited but... someone else is there. Looks like another one of the homonculus. Which of the seven deadly sins could this one be?

I'll throw in my thoughts about the new op/ed too since I haven't commented yet (But I'm not as good a music critic as BluWacky is). The op is "Undo" by Cool Joke. Never heard of 'em before. It's okay and the animation to go with it is fine, too. As for the ed, "Motherland" by Crystal Kei.. all of you Winry fans have gotten what you wanted, ne? ;) Song itself is okay. The melody in the chorus sounds like something I've heard before for some reason.... Anyways, both are neither extraordinary nor really bad, just average, I suppose. That's it for the music criticism today :)