Last week, the episode aired was "All Your Fault." It was an episode about the Lemongrabs and has no repercussion on the rest of the series. The premise is that the Lemon Kingdom has run out of candy to feed them so Princess Bubblegum sends Finn and Jake there with candy seeds. They find the kingdom over run by starving Lemon people and they have to go to the dungeon of the castle to find Lemongrabs. When they find them, they learn that Princess Bubblegum left the method of creating people from candy behind and the Lemongrabs couldn't control their urge to create life. They used all the food to create life and decide to storm the Candy Kingdom to create more life. They use a giant lemon creature to attack but Finn and Jake stop him by activating his heart and giving him feelings.
As much as the title would suggest, it really is not an important episode for the long term, unless something unforeseeable happens in the future. The episode was funny while Finn and Jake were searching the castle and they reacted to all the messed up lemon people.
Final Rating: 8.5/10
2/4: Little Dude-Finn's Hat comes to life
2/9: Preview of Bad Little Boy-Genderswap with Marshall Lee
2/11: No new episode
2/18: Bad Little Boy
2/25: Vault of Bones-Finn worries Flame Princess may be evil