Switched at Birth: Meredith Baxter Returning With a Surprise for Kathryn

Switched At Birth Season 4

Meredith Baxter is returning to ABC Family’s Switched at Birth (Tuesdays, 9/8c) — and she’s not coming alone!

The former Family Ties star will reprise her role as Bonnie (Lea Thompson’s on-screen mother) in a February episode of the drama, and TVLine has learned that Thompson will also be directing the mother-daughter reunion.

Bonnie will return — with BFF Lucille, played by Six Feet Under‘s Joanna Cassidy, in tow — to deliver some “shocking news” to Kathryn.

Thompson excitedly shared this photo herself with Baxter and Cassidy on set:

http://instagram.com/p/xk5Q4wPGYp/

Any theories about the big news Bonnie has for her daughter? Drop a comment with your thoughts below.