Viewers will witness how the design team came to the home of Chris and Diamond Harris, who are the parents of healthy two-and-a-half-year-old sextuplets and nine-year-old DeWayne. After DeWayne was born, the couple didn't seem to be able to get pregnant again, and so turned to a specialist for help. They were shocked when an ultrasound showed Diamond pregnant with five babies, and surprised again when they discovered at delivery time that they had a sixth baby. The Harris Sextuplets are America's first-ever surviving set of African American sextuplets.

The Harris family's house called for many things, including more space, a safer home and a much-needed playroom for six very energetic toddlers. The design team, homebuilder Signature Homes and hundreds of workers and volunteers solved the space issue to accommodate the sextuplets by building a 5,000-sq. ft. home, one of the show's largest to date.

During this edition of ""How'd They Do That?,"" there will be a behind-the-scenes moments wi