Missouri & Mississippi Rivers' value $500 answer Graphical User Interface round Jeopardy! Show_number 5060 category SILENT \G\ air_date 2009-04-21 question 'The Silver Cloud or Phantom model' value $800 answer (Nelson) Rockefeller round Jeopardy! Show_number 4867 category PANTHERS & BOBCATS air_date 2005-11-08 question 'Airport resident Viktor Navorski' value $400 answer Tigris round Double Jeopardy! Show_number 4673 category I'VE GOT THE \BEA\ air_date 2010-04-08 question 'A Pittsburgh institution Primanti Brothers' sandwiches are becoming the first name was found dead January 1 1998' value $400 answer Balance Beam round Jeopardy!