Jeopardy! Season 30 Show #6834, Battle of the Decades quarterfinal game 4. Season 30, episode 169 Show #6834, Battle of the Decades quarterfinal game 4. May 8, 2014 Today’s Contestants: Ken Jennings vs. Rachael Schwartz vs. Tom Cubbage Previous episode Show #6833, Battle of the Decades quarterfinal game 3. Next episode Show #6835, Battle of the Decades quarterfinal game 5.