Couchtuner Perfect Harmony NBC Watch Series Online. When former Princeton music professor Arthur Cochran unexpectedly stumbles into choir practice at a small-town church, he finds an oddball group of singers that is out of tune in more ways than one. Despite the ultimate clash of sensibilities, Arthur and his newfound cohorts, including temporary choirmaster Ginny, her ex, Wayne, vocal powerhouse Adams, gentle giant Dwayne, the impossibly upbeat Reverend Jax and more, may just be the perfect mix of individuals to help each other reinvent and rediscover a little happiness… just when they all need it most.