: The episode reveals that DNAliens are actually humans mutated by Xenocyte parasites.

While Ben, Gwen, and Kevin focus on destroying shipments of Xenocytes, Max confronts a Highbreed commander. Facing overwhelming odds and the threat of the Highbreed's global infection plan, Max chooses to detonate an unfocused like a grenade. The resulting explosion vaporizes the factory and seemingly kills both Max and the Highbreed commander, leaving the trio devastated but determined to finish his mission. Key Features & Reveals

: This is the first appearance of Gwen's brother, Ken.

"" is the sixth episode of the first season of Ben 10: Alien Force and serves as a major turning point in the series. It features the long-awaited reunion with Grandpa Max and concludes with his shocking self-sacrifice. Episode Summary

: Though presumed dead after the explosion, it is later revealed in the episode " Voided " that he was actually transported to the Null Void.