FX's upcoming untitled Witness Protection pilot has just received an exciting update. Aidan Gillen At Celebrities Visit SiriusXM - January 17, 2020 | Roy Rochlin/GettyImagesGame of Thrones actor Aidan Gillen boards FX's Witness Protection pilotAccording to Deadline, Gillen will guest star in the pilot. The Witness Protection pilot will be directed by Hannah Fidell (A Teacher), who is also a co-writer, showrunner, and executive producer. She betrays her partner and goes into witness protection in coastal Maine with her daughter. Other than FX's Witness Protection pilot, we'll see him next in The Physician II, Tall Tales & Murder, Black Noise, Panic Carefully and The Duel.