In The Dark Moon, Scott and his Pack first encounter Kate's Berserkers in Mexico. One was stalking Scott and Braeden in the Aztec temple beneath La Iglesia where Derek Hale was being held. Scott scared it off with an Alpha's roar. The second demon had broken Stiles's Jeep down in the middle of the road with its blade. Malia catches sight of the monster and was wounded by it.

In 117, Peter Hale identified the Berserkers when one of them faced he, Scott and Malia. He advised they run, only for them to run into the second Berserker. Scott, Kira and Malia attempt to fight them off, but they were easily overpowered. Derek arrived and managed to hold

them off. The Berserkers heard a screeching werejaguar roar from Kate, a signal, and so they retreated.

In "Orphaned", the Berserkers under Kate's directions attack a number of assassins that were flowing into Beacon Hills, eventually attacking the

federal transport vehicle that was holding Violet, one of 'the Orphans', injuring Scott, Sheriff Stilinski and Rafael McCall, and killing Garrett, the other 'Orphan', in the process. Scott and Chris face off against Kate and the Berserkers at the abandoned Argent Arms International warehouse. Chris, armed with a machine gun opened fire on the Berserkers to no use. One Berserker was about to give Chris the killing blow, but Kate let out a werejaguar roar calling it off.