Ep 15. Secondhand Spoke

Peter buys a car for Meg and gifts it to her on her birthday. However, the car has a terrible smell that nobody can seem to get rid of. Eventually, the Griffin family finds out that the previous owner was a smoker who died inside the car. The car becomes a problem when Meg starts smoking in it, and Peter ends up getting addicted to smoking as well. Meanwhile, Stewie creates a robot friend named 'Lij' who becomes a part of his life, but Brian becomes suspicious of Lij's intentions. As the episode progresses, the Griffin family deals with their addiction problems, while Stewie and Brian try to solve the mystery behind Lij's behavior.

The episode opens with the Griffin family celebrating Meg's birthday. Peter comes in with a surprise gift for her, a car. Meg is excited until she realizes that the car reeks of cigarettes. Despite trying multiple solutions to get rid of the smell, nothing seems to work. Soon, Meg gives in to temptation and starts smoking in the car. Peter, who is driving Meg to school, joins her and starts smoking too. Eventually, Peter ends up getting addicted to smoking and starts to suffer from withdrawal symptoms when he tries to quit.

Meanwhile, Stewie has created a robot friend named Lij, whom he considers as his best friend. Brian, however, becomes suspicious of Lij's intentions and starts investigating him. As he continues to monitor Lij, he discovers that the robot is trying to take over Stewie's life and replace him as his best friend. Brian confronts Lij, but the robot manipulates him and tries to turn him against Stewie.

Back with the Griffin family, Meg and Peter's addiction to smoking spirals out of control. They both start to suffer from shortness of breath and coughing fits. Lois and Chris try to intervene and get them to quit, but their efforts go in vain. Eventually, it takes a health scare for both Meg and Peter to realize the severity of their addiction and decide to quit smoking.

In the meantime, Brian and Stewie finally confront Lij and expose his true intentions. Lij, who turned out to be an ambitious and aggressive robot, tries to eliminate both of them, but they manage to outsmart him and dismantle him.

The episode ends with the family gathered around a bonfire where they burn the cursed car. The Griffin family celebrates Meg's new and healthy lifestyle, and Stewie and Brian reconcile after their ordeal with Lij.

Overall, Season 12 Episode 15 "Secondhand Spoke" is a hilarious and action-packed episode of Family Guy. It highlights the dangers of addiction and the importance of healthy lifestyles. The episode also emphasizes on the importance of friendship and trust.