Showrunners Terence Paul Winter and Alexi Hawley confirmed the “reunion” casting as part of TVLine’s May Sweeps/Finale Preview Q&A, saying that Staite will appear in Episode 20, titled “Much Ado About Murder” and airing May 2, as the director of a Shakespearean Broadway staging whose movie-star lead turns up dead.
“There are some great scenes between her, Nathan [Fillion] and the boys,” Winter said. “She came to play, she was really great.” Staite of course is far from the first Firefly alum to guest-star opposite her former Serenity “captain”; most recently, Summer Glau stopped by the ABC series.
Staite’s TV credits also include Stargate Atlantis, The Killing (as D.A. Caroline Swift, Holder’s girlfriend), The L.A. Complex, Wonderfalls and a recent visit to DC’s Legends of Tomorrow.
Castle continues Season 8 on Monday with Episode 18, “Backstabbers.”