The cast of Brothers & Sisters continues to expand.

Over the last week, actors Joe Morton and Denzel Whitaker have landed recurring roles on the ABC drama.

Now, Entertainment Weekly reports that we can add two more names to that list:

• Amy Aquino, who starred on ER as Dr. Coburn, will play another doctor. This time, her characters treats a member of the Walker family.
• Peter Gerety (Homicide, The Wire)  will appear as a “surprising outsider,” according to sources.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.