Vergara's character will be seen in the "Teenage Mutant Milk-Caused Hurdles" episode which will see Bart drink a milk substitute that contains some irregular hormones that trigger early puberty, and see the 10-year-old boy grow a moustache and more adult feelings and once Mrs. Berrera pays him some attention he falls in love with her.

Mrs. Berrera will also attract attention from Principle Skinner, after he learns she is also a fellow war veteran, and the storyline will see the hapless headteacher and his nemesis Bart fight for her affections.

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In the episode, Skinner will once again be voiced by Harry Shearer, who is returning to the programme after leaving earlier this year over a contract dispute.