Andrew "Andy" McDonald was a scientist living in an apartment in University Square. Using a substance known as Wellsite given to him by a mysterious stranger, who Lara later discovered was herself in an endless predestination paradox, he was able to build a time machine which he called the Quicksilver. Before he could begin to explore space and time, however, his machine was stolen by his fourteen-year-old friend, Lara Myers, who had been the only one he'd shown his machine to, and the same person directly responsible for its construction in the first place. ("The Wee Time Traveler")