The Flintstones Season 6 Episode 17
Gazoo takes Fred on a trip to the twenty-first century, including a stop at Slate Rock and Gravel Company, where Fred learns that the interest on a $4.00 loan he took from Mr. Slate comes to more than $23-million! Upon returning to the Stone Age, Fred vows to repay the loan immediately.
Serie: The Flintstones
Episode Title: The Long, Long, Long Weekend
Air Date: 1966-01-21