Rich Man, Poor Man (1976)

S8E6 Quagmire's Baby

Quagmire steps up when a baby is unexpectedly left on his doorstep, proving that he may not have all the answers. Meanwhile, Stewie concocts a foolish clone of himself to serve his whims. However, when he also makes a clone of Brian, they soon discover that their creations are highly unstable, leading to chaotic breakdowns as the clones malfunction.