So, as you saw, SOD confirmed that Tonja Walker was coming back (even tho Wubs guessed it!) So here we are with another mobular character in town. YET! TW is so great at being bitchy --she and Maura West will just be great together. One of the biggest things you need to know is she was involved with Duke Lavery back in the day. She was on the show from 88-90 as Olivia St. John. From Wiki :
Her brother Julian eventually becomes the head of the Jerome empire, but is seeking revenge on Duke for turning against his father. Her brother tries to enlist Olivia in a plan to get back at Duke for his betrayal.
However, their plan misfires, and Duke's wife, Anna Devane, miscarries their unborn child. Olivia tries to alert Anna about Julian's plans, but Julian kidnaps her and eventually kills her before she can.
Duke wants revenge, but is "killed" trying. However, an impostor named Jonathan Paget shows up looking like Duke. Julian and "Duke" where he us killed and Julian is presumed dead.
SO..GET THIS!! Duke was dead came back
Julian was dead and came back...and now...DEAD OLIVIA is back!