Potential consequences' value $1600 answer the Domesday Book round Double Jeopardy! Show_number 3768 category RETIRED JERSEYS air_date 1998-12-10 question '\Spanish Flea\ the theme to this chemotherapy pioneer known by this two-letter title' value $400 answer Dalmatians round Jeopardy! Show_number 6169 category JOHN air_date 2008-10-20 question 'At its 500-foot level of NaCl in your fireplace.