In ' Play It Again, Brian' ( season 6, 2008), Herbert is hired by Peter and Lois to babysit their children Chris, Stewie and Meg.

When Chris gets a new job in ' Movin' Out (Brian's Song)' ( season 6, 2007), his younger brother Stewie takes over his paper route with Herbert attempting to seduce him much in the same way as he does towards Chris, but is rebuffed by Stewie, who refers to Herbert as a 'perverted old freak', insisting he should “piss off” though this only furthers his lust for the infant. Herbert later invites Chris to dinner wherein a souvenir photograph of the pair is taken. In ' The Courtship of Stewie's Father' ( season 4, 2005), Chris breaks Herbert's window with a baseball and Chris assists Herbert with chores around his house in attempts to pay off the debt, much to Herbert's delight. Despite his pleas, Chris refuses the offer. In his first appearance, ' To Love and Die in Dixie' ( season 3, 2001), Herbert attempts to seduce Chris inside the house by offering him a popsicle that Herbert insists is in his basement.

He is a single elderly man who dresses in a baby blue bathrobe and utilizes a walking frame due to his age his dog Jesse is equally elderly and decrepit, being unable to use his hind legs. Herbert lives in the fictional town of Quahog, Rhode Island, which is modeled after Cranston, Rhode Island. Herbert has appeared in various Family Guy merchandise and has made several crossover appearances in The Cleveland Show, a Family Guy spin-off. Herbert has received mixed reviews from critics, who have expressed varying opinions on the pedophilia-related humor involving the character. A pedohebephile who is attracted to young boys, he harbors unrequited love for Chris Griffin. Herbert is an elderly neighbor of the Griffin family who first appeared in the season 3 episode ' To Love and Die in Dixie'. John Herbert, nicknamed ' Herbert the Pervert', is a fictional character in the animated television series Family Guy, created and voiced by Mike Henry.

Herbert the pervert voice changer