Jedi Council
Grievous makes a brief appearance in the opening sequence of "Old Friends Not Forgotten", the first episode of the Siege of Mandalore story-arc from the seventh and final season. As the arc takes place during the events of "Revenge of the Sith", Grievous has a different design, reminiscent of his appearance in the film, and is commanding his fleet in an attack on Coruscant with the goal of capturing Chancellor Palpatine. Grievous is mentioned in the following two episodes, "The Phantom Apprentice" and "Shattered", when Obi-Wan states that he is going to Utapau to hunt him down, and later when Ki-Adi Mundi mentions during a meeting with the Jedi Council that Grievous has been killed (similarly to a scene from "Revenge of the Sith").