In honor of the most romantic day of the year, we are pitting our favorite TV couples of all time against each other in a 16-bracket contest. Think of it as March Madness, only Cupid style.

Best of all, you decide the winner -- the best TV couple of all time.

Which couple should win the title: Clair and Cliff ("The Cosby Show") or. Mary and Matthew ("Downton Abbey")?

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