Upgrade is the thirty-fifth episode of Slugterra.
Dr. Blakk has been captured! Now it's up to the Shane Gang to transport him to Stalagmite 17, the only prison that can hold him. To do so, they're going to need some serious speed. That's just what they get when we reveal Kord's new modifications to their Mecha Beasts! But will it be enough to stand up to Blakk's own newly-designed super vehicles?
After learning that Blakk resurfaced in slugterra, the Shane Gang transport him to Stalagmite 17. During the trip, Quentin, using his new Titan Tanks, try's to break Dr.Blakk out. After escaping him once, Kord reveals the new mecha updates he made. After returning, Quentin drives the gang into a gorge full with 3 other tanks. Despite defeating all the tanks however, Blakk gets out and into a tank. While chasing the gang though, Eli discovers Megamorphing by driving his mecha until 100 mph while he was about to shot Burpy. After being knocked into a gorge, Eli manages to take out Blakk and manages to get him to Stalagmite 17.
- According to Trixie, Dr. Blakk has been gone for more than two weeks since the Shadow Clans teleported him to somewhere else in the episode "Lightwell".
- Trixie says that Stalagmite 17 has been reinforced since Mr. Saturday took over in "Mission: Improbable".
- Quintin returns after his first appearance in "Roboslugs" and Trixie also mentions that his inventions almost crushed them from the same episode.