Switched at Birth, a one-hour scripted drama, tells the story of two teenage girls who discover they were accidentally switched as newborns in the hospital. Bay Kennish grew up in a wealthy family with two parents and a brother, while Daphne Vasquez, who lost her hearing at an early age due to a case of meningitis, grew up with a single mother in a working-class neighborhood. Things come to a dramatic head when both families meet and struggle to learn how to live together for the sake of the girls. In the emotional 90-minute series finale of the award-winning drama, Kathryn becomes nostalgic when she realizes that it’s been five years since the switch was discovered and the two families started living together. As she searches for memories, Kathryn discovers a long buried family secret – stretching all the way back to the switch – that changes everything. Daphne competes against Mingo for a six-week paid internship in sports medicine. Bay is celebrated for her tattoo work in a magazine spread, but her struggle to prove herself as an artist to John threatens to destroy their relationship. Toby meets Amelia (guest star Lauren Potter, “Glee”), a young woman with Down Syndrome who changes his perception about his son’s future. Melody, Emmett and Travis make some major decisions about their lives, and Regina takes a chance on love. Travis and Bay have dinner with his birth mom, but the reunion dredges up painful memories of his childhood assault. Daphne contemplates helping Chris cheat on a test. Regina gets paid an unexpected visit. Needing to pay their electric bill, Bay and Daphne throw a “lights on” party at their apartment above the Cracked Mug but things go awry when Toby overhears two students making disability jokes. Toby and Bay’s high school frenemy Simone turns up looking glamorous and successful. Meanwhile, as Daphne and Chris get to know each other better, she starts to suspect that he’s hiding a big secret. Kathryn and Regina do some old-school snooping on Luca after Regina sees a questionable text on his phone. In the series 100th episode, a mysterious young woman has Bay and Daphne flooded with memories of their deceased father Angelo, and they must decide if they should let her into their lives. Toby is caught between his mother’s wishes to baptize his son Carlton and his wife’s feelings about faith. Melody asks her sons to make amends so the family can be together for her birthday, but it might be too late. Daphne takes a volunteer job at a clinic for extra credit and comes face-to-face with her old mentor, Dr. Jackson. While eager to mend fences with him, she grows alarmed when it becomes obvious he’s having trouble properly treating his patients.