Robby Roseman was the first contestant to walk away with nothing, due to losing on the $100 question. The question was, "Hannibal crossed the Alps using what animals?"- the correct answer was B: Elephants, but Robby chose C: Llamas.
The first hour-long episode.
Regis's comment that they've never prepared for a $0 winner is accurate, as an accompanying "Total Prize Money: $0" graphic hadn't been created. This graphic wouldn't debut until Brian Fodera lost on the $100 question.