This exciting two-part special takes viewers onto the dance floor and behind the scenes as ballroom dancing's elite - 24 top professional ballroom dance couples from North America - go toe-to-toe, with just one team emerging as "America's Best." Marilu Henner ("Taxi," "Evening Shade," Broadway revival of Chicago) and Tony Meredith (former U.S. Professional Latin American Dance Champion) host. (Part 1 of 2)