As The Shadows Deepen 18th is the episode of the second season of Switched at Birth.
Bay decides to put on Deaf Day at Maui to bring in more customers, since the park has been losing business. She gets help from Emmett, which causes problems when Ty sees the two of them together. Daphne finds out that Jeff is now Jace's friend's fiance and that the two were in a long-term relationship, despite Jeff's affair with Daphne a while back. Red flags are raised about Jace after he tries to steal a credit card and tells Jeff's fiance the truth. Toby suggests that Nikki visit the guy who killed her father in prison to get closure. John starts to mend his relationship with his father. Bay also learns that Ty is about to be deployed back to Afghanistan.
- D.W. Moffett as John Kennish
- Lea Thompson as Kathryn Kennish
- Lucas Grabeel as Toby Kennish
- Sean Berdy as Emmett Bledsoe
- Katie Leclerc as Daphne Vasquez
- Vanessa Marano as Bay Kennish
- Constance Marie as Regina Vasquez
- Giles Marini as Angelo Sorrento
- Blair Redford as Ty
- Matt Kane as Jace
- Cassi Thomson as Nikki
- Ryan Lane as Travis
- Stephanie Nogueras as Natalie Pierce
- Justin Bruening as Jeff Reycraft
- Daniel Nicholas Durant as Matthew
- Title reference: From the 2000 painting, As the Shadows Deepened, by Eyvind Earle.