XY Press Release: 

After passing her Captain's exam in the Season 7 finale, Beckett was surprised with another offer to run for State Senate. In the action packed season premiere, Castle and Beckett are adjusting to Beckett's career change, when a call from a mysterious stranger sets off an explosive chain of events.

There are always two sides to every story, and this unique two-parter will explore the same story from each of their perspectives, first from Castle's side as he searches for Beckett in the exciting Season 8 premiere, "XY." Season 8 of "Castle" begins on MONDAY, SEPTEMBER 21 (10:01- 11pm ET/PT) on the ABC Television Network.

Guest cast: Sunkrish Bala as Vikram Singh, Brad Lee Wind as Franco Mancini, Coby Ryan McLaughlin as Brooks, Jack Coleman as Senator William Bracken, Daisy Betts as A.J.

Written by Terence Paul Winter and Alexi Hawley and directed by Rob Bowman