Yes, we're as madly in love with Caskett as you are. But this Valentine's Day, we're thinking about all the other couples who've made Castle sizzle over the years. Who's your favorite?
KEVIN AND JENNY
When Kevin finally introduced his "invisible girlfriend" Jenny to the team, it was clear they were a perfect match. After a roller coaster engagement and wedding planning, the Ryans are now working on their next adventure - starting a family.