Colonel Nesvig is the officer in charge of security at McKinley Rocket Base in Assignment: Earth, responsible for guarding the 1968 launch of an orbital nuclear platform.
Colonel Nesvig is a United States military officer in the Original Series episode Assignment: Earth. He commands security at McKinley Rocket Base during the launch of a rocket carrying a nuclear weapons platform into orbit.
Nesvig works alongside the launch director, Cromwell. His men fail to keep out Gary Seven, who arrives with forged credentials, and they also pick up Kirk and Spock, who have beamed down from the Enterprise in period clothing to find out what Seven is doing.
The two Starfleet officers are held under guard in mission control as the rocket malfunctions. Nesvig's base becomes the scene of a near catastrophe that ends when the warhead explodes at a safe height.