Over the life of Nathan Fillion's ABC series Castle, the star has never shied away from his Firefly past, having dressed in his Mal Reynolds costume for Halloween one year and more recently referencing the show while his character was at a science-fiction convention in Castle. Well, now he'll have some company, straight from the Serenity: Gina Torres, who played Zoe on Firefly, will join Fillion on Castle for an upcoming episode set to air during February sweeps, reports TV Line. Torres will appear in the upcoming episode "Reality Star Struck" as "Samantha Foster, a successful fashion mogul who comes off as ruthless and fierce on a Real Housewives-esque reality show. But get this — she may be even more devious when the cameras aren't rolling," says the report. Torres isn't the first Firefly alum to storm the Castle; Adam Baldwin, fresh off the cancellation of Chuck, appeared on the series in April.