Vestigial Peter

Vestigial Peter is the second episode of the twelfth season and the 212th overall episode of the animated comedy series Family Guy. It aired on Fox in the United States and Canada on October 6, 2013, and is written by Brian Scully and directed by Julius Wu. In the episode, Peter finds a strange lump on his neck that turns out to be a vestigial twin, who ends up winning over Peter's family and friends with his optimism and sense of wonder.

Plot
Peter finds a strange lump on his neck that turns out to be a vestigial twin, who ends up winning over Peter's family and friends with his optimism and sense of wonder.

Why It Sucks

 * 1) It is mostly a Peter torture episode, as he is forced to do everything Chip wants to do, and put through uncomfortable situations, such as laying in bed, while Chip sleeps with his boss, Angela in bed, he tries to kill Chip with a Dingo, and gets attacked by the Dingo after he puts the steak in his pants.
 * 2) Lois can be a bit unlikable in this episode for two reasons: One, in a flashback she attacks and beats up Peter for getting groceries to appreciate her, she prances on him and goes insane, she even attacks Chris by throwing a can at him when he gets the rest off the groceries from the car. Two, she takes a picture off Peter and calls him "gay" after he exits out off a Dressing Room at the mall. Lois would later attack Peter in A Shot in the Dark.
 * 3) The tennis scene off Chip repeatedly saying, "WOW!" can be very annoying.

Redeeming Qualities

 * 1) It can have some funny moments
 * 2) The infamous scene with Peter roller-blading wearing a woman's shirt can be funny.
 * 3) Thankfully, Chip never returned in any future episodes off Family Guy.

Reception
Eric Thurm of The A.V. Club gave the episode a C+, saying "The volume of those jokes makes it hard to watch the rest of 'Vestigial Peter,' which is too bad, because there’s a lot of decently funny and almost interesting stuff in this episode. The opening segment at the mall keeps cutting back to an establishing shot of the mall itself (has the show ever done something like this?), which gives off the impression that the mall is some sort of weird, nightmarish, repetitive hellscape, which, well… Some of the humor in “Vestigial Peter” is even in the main plot. Chip wins over Brian by appealing to his smug Prius ownership in a joke that seems like it slipped in from a better episode, and the jokes about Peter and Chip’s shared biological functions are crass, but not directly offensive and raunchy in just the right way for Family Guy. With less transphobic crap and more Quantum Creep (where the joke is the bad/awesome pun and is not that flashing is awesome), “Vestigial Peter” would have been a really solid episode of Family Guy for this season instead of something that appeals to the worst parts of the show’s fan base."

The episode received a 2.5 rating and was watched by a total of 5.20 million people, this made it the second most watched show on Animation Domination that night beating American Dad! and Bob's Burgers but losing to The Simpsons with 6.42 million.