|“||I don't do Overflow, I go Undertow!||„|
|~ Undertow to Four Arms.|
Undertow is Mutant Cascan Hybrid and one of the Antitrix aliens in the 2016 Ben 10 series. He is the counterpart of Overflow.
Ben 10 (2016)
Undertow returned in the episode You Remind Me of Someone, where after Kevin forgot who he was went to turn into him to fight against Ben as he also forgot who he was thanks to the Forgeti, he possibly turned into Dark Matter after this.
Undertow also appears in the episode Adrenaland Jr., where Kevin turned into Bootleg to cause havoc across an amusement park and injoy the rides, only to later turn into Undertow to fight against Ben, he possibly turned back into Kevin after the day was over.
In the episode The Greatest Lake, Kevin turned into Undertow to fight against Hex with Ben, only for Hex to posses him, Ben, Gwen Tennyson and Max Tennyson continued to fight against and turned Kevin back to normal.
In Ben 10 Versus the Universe: The Movie, Kevin turned into Undertow to fight and possibly escape Vilgax.
- Unertow shares his name with a studio album.