300px-Captain Blue

Capt. Blue SquarePants is a retired police captain and is one of the sons of Grandma and Grandpa SquarePants, uncle of Stanley, BlackJack, SpongeBob,Larry, and Todd, and brother of Sherm and Harold. He was only seen in the episode, "BlackJack". During the episode, SpongeBob said he needed some help from a crime fighter like Blue to save his parents from Blackjack, but Blue told SpongeBob that he was retired from being a police captain.

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