I love "12 Monkeys" and have seen it a dozen times. Still I can't figure out if Jeffrey Goines is working in conjunction with redheaded scientist to destroy mankind, or if Jeffrey's only plan was to let all the animals out of the zoo.
At one point Jeffrey's father says he has stepped up security in the lab to prevent any trouble with the virus, and Jeffrey says "too late," suggesting Jeffrey indeed is involved with the virus plot and knows it is already in motion. And earlier, when the psychiatrist spray-paints a question about billions of deaths, Jeffrey seems to know what she is asking about.
Releasing the animals could be a secondary part of the virus plot -- perhaps a distraction or a way to jump-start the return of the animals' dominion over earth. But the movie seems to leave room for the possibility that Jeffrey was only interested in releasing the animals and was unaware of redheaded scientist's actions. Which is it?