Neptune was the god of freshwater and the sea in the Roman religion. He is the counterpart of the Greek god Poseidon, and the brother of Jupiter and Pluto.
In September 1984, Marty finds a statue of Neptune with an umbrella necktie around its neck in Doc's garage. Doc says he picked it up for a giant fish tank that he never got around to building. It resembles the statue from the Enchantment Under the Sea dance, suggesting that Doc might have purchased the statue from Hill Valley High School after the dance concluded.
- Back to the Future (A Neptune statue is at the Enchantment Under the Sea dance)
- Back to the Future: Untold Tales and Alternate Timelines