When it comes to good TV, it takes two to make a thing go right. Whether you’re talking about great comedy teams, hot romantic couples, unbreakable crimefighting partnerships, or unforgettable hero-villain rivalries, two is the magic number of countless television classics. With that in mind, we’ve compiled the following list of the 50 greatest duos ever to grace the small screen. Husbands and wives, cops and robbers, best friends forever — they’re all here, and they all demonstrate the power of the most elemental equation of all: one on one.