If you watched The Swan last night, you probably saw, A) some seriously heinous tooth decay, and B) an ad announcing the Jan. 3 premiere of Fox's paternity game show Who's Your Daddy? If you thought the latter was just a joke, think again. The long-rumored project first announced at press tour last summer by rival network head Jeff Zucker revolves around an adopted woman who must figure out who her father is among eight contestants. The twist? Right before her pa is unmasked, the world comes to an end.