The Flintstones

The Long, Long, Long Weekend (6x17)

Air date: Jan 21, 1966

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.