There are many kinds of “mad professors:” André Marie Ampère, for example, came up with a groundbreaking scientific law in a taxi, only to leave the note it was written on behind as he got off. He had to chase the taxi through the streets of Paris for miles to recover it. Ludwig Boltzmann is another example of a mad professor. He used to give complex lectures on calculus just to do all the math in his head without really explaining anything. When asked to talk them through his thinking by students, Boltzmann offered a simple “it’s as easy as 2+2=4!” and wrote that single equation down on the blackboard. Henry Hassel is another mad professor. Having finished work early one afternoon, he walks home to find his wife in the arms of another man. Furious, he assembles a time machine in the matter of minutes to go back in time and stop his wife from being born. However, even after he kills all of her grandparents, Hassel’s wife still exists in the present. Even more enraged, Hassel travels further back in time to murder George Washington, Christopher Colombus, Napoleon, and Mohammed, among others. Yet, when he comes back to the present, his wife is still there. He looks a bit closer at the man she is embracing only to discover that he is Wiley Murphy, a scientist who has made a time machine of his own. Hassel sits down with him, and the two discuss the nature of time together.