Bay discovers that she and her biological mother Regina have a lot in common, and the Kennishes have their first experiences with Deafness and Deaf Culture.
After learning that Regina is in financial trouble, the Kennishes invite her and Daphne to move into their guest house.
Kathryn admits the truth about Daphne and Bay to one of her friends, Denise, in order to end the rumor that John had an affair with Regina years before and Daphne is their 'love child.' Daphne gives Bay a photo of Regina when she was pregnant, which was taken by Bay's biological father.
Bay learns that Daphne is seeing her ex-boyfriend Liam, while Daphne, Kathryn, and Regina learn that Bay is seeing Ty.
They take the issue up with Regina, who feels threatened.
John and Kathryn also decide that they want to sue the hospital.
This leads to Daphne becoming more self-conscious and insecure.
Bay and Emmett bond while working together to find Bay's biological father, and they discover that his name is Angelo Sorrento.
On August 1, 2011, ABC Family announced that they were ordering more episodes for the first season of Switched at Birth, bringing the first season to a total of 30 episodes.
Emmett comes to pick up Daphne, and he forgives her for bailing on him.
Meanwhile, Regina opens up to Bay about her past drinking problems.
Through a school experiment, she discovers that her blood type is different from her family's.
After taking a DNA test, the Kennishes learn that she was in fact switched at birth with Daphne Vasquez, an athletic Deaf teen living with her single mother Regina and grandmother Adrianna on the other side of town.