'Bones' Season 9 casts Richard Schiff and McKayla Maroney
According to EW.com, both guests will appear in an episode focusing on the murder of a physicist's daughter, Amanda. Schiff will play Dr. Leon Watters, the "Brennan of theoretical physics." After his daughter dies, the man becomes detached -- but Brennan ( Emily Deschanel), seeing herself in the scientific genius, understands that Watters has to focus on work in order to be able to cope with the situation.
Considering Brennan is a parent of a daughter herself, it's possible that this will be a very poignant situation for her.
Maroney, a medal-winning gymnast at the 2012 Olympics, will play Ellie. She is described as both a friend and a rival to Watters' deceased daughter.
While at some point, "Bones" is expected to move to Fridays, for now the show airs Mondays at 8 p.m. on FOX. The next episode -- focusing on Booth and Brennan's honeymoon -- airs Monday, Nov. 4.