The Agent is captured and restrained by the scientist who has been contracted to perfect a serum that would allow control of heart an lungs thus being able to take soldiers to the edge in order to gather information . The serum is injected into the Agent and after painful convulsions his heart and lungs can be controlled. Initially the scientist starts with basic on/off. The Agent appears to be strangled without any physical intervention. Neck veins bulge, his face turning more and more purple the longer his oxygen is cut off he is taken to the limit, losing consciousness and being shocked back to life with a large burst of electricity.
Then the scientist takes things too far. Unfortunately the serum has a limit. And the agent doesn’t come back to life after several urgent burst of electricity. His body jerks with electricity, but his heart is no longer responding.
The scientist will have to start again with another subject!