Historical clue formulations

• "Book 'em, ___!" — 2019-03-20
• Guy with a lot of bookings? — 2017-07-12
• "Hawaii Five-O" nickname — 2013-11-26
• "Hawaii Five-O" nickname — 2013-04-17
• Nickname in a 1970's crime drama series — 2006-07-01
• "Hawaii Five-O" name — 2002-12-14