Kyle Zeller

Kyle Zeller was forced to work for Cybertek after his wife was kidnapped. He was forced by John Garrett to be Deathlok's handler.

Biography
While Kyle Zeller was introducing a new employee to the Cybertek Manufacturing Facility, Coulson's Team was being surrounded by Centipede-enhanced soldiers at the Barbershop Headquarters of HYDRA in Havana, Cuba. He instructed the other handlers in his charge to attack them. When Melinda May caused the building to collapse on them, Zeller reported this to Garrett who didn't care.

Later, Skye and May infiltrated the building during the Battle at Cybertek and told the handlers that they had a bomb to keep them quiet. Zeller told them that they accounted for this contingency by switching the soldiers to their default mode, the protection of John Garrett, but, to Zeller's surprise, the women had already planned for that.

Skye used Zeller's phone to call Garrett to tell him that Phil Coulson was coming for him; Garrett responded by bragging about ending Leo Fitz and Jemma Simmons, who, unknown to him, had been saved by Nick Fury.

Skye realized that he was a pawn like the others when, trying to rescue the captive Ace Peterson, she freed Mrs. Zeller.

Assuming that since he was Deathlok's handler and he wasn't communicating with him, Zeller was surprised to learn that Skye had already told Mike Peterson that his son was free, therefore he was free also to attack Garrett.