Kevin Spacey, Tom Petty & The Heartbreakers

The secret word is ""quadricentennial,"" and after doubling the stakes on last night's show, Dave ""raises"" them to an even hundred million; on a variation of a recurring bit, Biff goes out in traffic, harassing people with a bullhorn; Dave increases the jackpot again to $150,000,000; Darrell Hammond does his trademark Clinton impression.