In season 14, Henry Mesner's father and sister, Tom Mesner and Ruby Mesner were originally portrayed by Alex Manette and twins Brooke Liddell & Kiley Liddell. In this show, Henry's father and sister were played by Jason Cottle and Maxine Wanderer.
Deirdre Lovejoy (Dr. Mackie) previously appeared in 3 other episodes of SVU as different characters.