Beginning late Sunday night, a 30-year-old University of Pennsylvania dental student was held captive by three thieves who ransacked his apartment and then sat around for a while watching reruns of American Gladiator and old movies on his TV. After they finally left 11:30AM yesterday, they went on a shopping spree, buying sneakers, clothes, and gift cards using the man's credit cards and cash from his ATM accounts. Police caught one of the thieves last......