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Nathan is a comic book nerd who lives in Medford.

In his first appearance, he was in the entertainment room of the Cooper house. He was found by Meemaw when he and Sheldon Cooper were watching a Star Trek episode that Georgie has taped over. (A Live Chicken, a Fried Chicken and Holy Matrimony)

One day, he walks to King Kong Comics and sees a sign for a convention, and talks to Sheldon who was there at the same time. He boards a bus from Medford Station and goes to the convention, along with Hubert Gives, Sheldon, and several others. (A Pink Cadillac and a Glorious Tribal Dance)

He later buys a Doom Patrol and Suicide Squad Special #1 comic book from the comic store, which Missy had sold him. He gets a call from Sheldon asking to buy it; he offers a trade for a comic book to keep in his collection, and both agree. He never gets the comic book. Later on, Sheldon invites him to the comic book at night to calculate inventory and sort it via the computer, to his excitement. (A Tougher Nut and a Note on File)

At the Comic Book store, Sheldon reveals to Nathan that he's moving to Pasadena, California and asks if there's any good comic book stores there, after the conversation, they depart while Adult Sheldon narrates that after that, he never saw him again. (A New Home and a Traditional Texas Torture)