Deirdre Lovejoy is about to cause some serious problems for Addison on Private Practice.

The veteran actress (The Wire, Body of Proof, Bones) has been cast on a November episode of the ABC drama, TV Line reports. She will portray a patient who sues Kate Walsh's doctor for the wrongful birth of her daughter. Yes... birth.

Consider us intrigued.

Following a week off, Private Practice Season 6 returns this Tuesday with the debut of Matt Long as a new physician and a girl going missing from the hospital.

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