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?
VERA and JOE
We warned you this wasn't a Caskett photo gallery, but we had to include Rick and Kate's alter egos from "The Blue Butterfly." Vera and Joe walked away from a fortune so they could be together -- what's more romantic than that?