Family Guy (1999)

S6E11 The Former Life of Brian

Feeling the weight of lost opportunities in love, Brian embarks on a quest to find his old girlfriend, Tracy. To his astonishment, he learns he is the father of her son, Dylan. Tracy believes Brian should take on the responsibility of raising the boy and leaves him at the Griffin home. However, as Dylan wreaks havoc in the house, Brian's approach to fatherhood clashes with Lois and Peter, creating tension among them.