Nickelodeon is about to bring down the house — the “Loud House,” that is. The children’s TV network will introduce a bi-racial gay couple on the animated show “The Loud House.” The series, which centers around the life of Lincoln Loud and his ten sisters, will be the first Nickelodeon show in history to feature a married same-sex couple. The couple in question, voiced by Wayne Brady and Michael McDonald, will make their debut on the July 20 episode “Overnight Success.”