2005 Ultimate Tournament of Champions Round 2 Game 16, show # 4703.

Contestants: Tristan Mabry, a Ph.D. student from Philadelphia, Pennsylvania Sunny Schomaker, an events coordinator from Madison, Wisconsin Ken Jennings, a software engineer from Salt Lake City, Utah (whose 53-day cash winnings total $1,808,100) Ken Jennings game 54. (Cheryl: Go to outer space without leaving your couch. Clues from Chicago's Adler Planetarium, next on Jeopardy!)