There will be a special guest on the 100th episode of "Switched at Birth." Gilles Marini, who played Bay (Vanessa Marano) and Daphne's (Katie Leclerc) father, Angelo Sorrento, is returning to the series.

When the fourth season of ABC Family's "Switched at Birth" premieres next month it will be on a new day and at a new time, the network announced today. "Birth" will begin airing Tuesdays at 9:00 PM ET/PT beginning <strong>January 6</strong>, following the winter season premiere of the network's "Pretty Little Liars."