The fourth season of Velocity: The Dark Human Slayer consisted of 18 episodes, like the three seasons.
The season premiere on November 6, 2002 and ended on March 5, 2003.
Chapter 55: Saving Elisha - Velocity must save Elisha when a mysterious group that dislikes Dark Humans wants to kill her.
- Chapter 56: White Order - Velocity finds himself in a icy prison by a group of polar bears called the White Order.
- Chapter 57: Shunky's Stories - Shunky tells 3 shorts as stories to the audience. (This is the only episode that received mixed reviews)
- Chapter 58: Velocity vs. Nancy - Velocity faces a Carrie-esque Dark human named Nancy, who is planning to kill a Gerbil kid.
- Chapter 59: Kristina Returns - Kristina returns to get her revenge on Velocity.
- Chapter 60: Prime the Slayer - A prequel episode how Cheif stopped Brimstone from trying to wipe out living things besides them for the first time. (The beginning of the episode was animated by TMS Entertainment)
- Chapter 61: Sky City - a Dark Human named Jack plans to destroy a city populated by birds, so Velocity must stop him.
- Chapter 62 : Magic - Velocity protects a magical Phoenix bird from a familiar Dark Human
- Chapter 63: Golden Weaver - A Dark Human named Jason heads after a mysterious dog who can turn straw into gold, so Velocity must protect him.
- Chapter 64: Velocity Vs. Brimstone - Velocity and Brimstone face off on a giant volcano. Meanwhile Elisha finds a ancient person who claims he can end the Dark Humans if they get Cheif's ancient armor.
- Chapter 65: Grimm's Assault- The ally to Elisha reveals he works for the Dark Humans and then he puts on the Armor and heads after Velocity.
- Chapter 66: The Baylee Problem - Fed up with Baylee, Brimstone kicks Baylee out of his team, and keeps annoying Velocity.
- Chapter 67: The Young Dark Human - Shunky finds a young Dark Human Velocity, and Elisha try warning him she works for Brimstone. Can they convince him that she is evil?
- Chapter 68: Three Female Dark Humans and a Triceratops -
- Chapter 69: Death Comes - A mysterious man named Death heads after Velocity, and he discovers he is a race of human the same race as Grimm.
- Chapter 70: The Story of Humans - (Is also pilot for the spin-off series The Human Race)
- Chapter 71: Velocity's last Stand - When Brimstone gets back from the dead again, and assaults a old mine, Velocity must beat him once for all.
- Chapter 72: Velocity and Hillary- Velocity gets stuck with a Dark Human named Hillary. (Series finale until Chapter 73: The Rise of the Slayer premeired in 2018)
- Prior to the confirmation of the fifth season in June 2017 and the season airing in 2018, this was the final season.