Today on twitter reports were coming in via the hash tag #dwsr that Jenna Coleman and Jemma Redgrave were both sighted by Caerphilly Castle.
Given that Jemma has been recently announced and casted for the the Big Finish audio series UNIT: New Series - Extinction is very intriguing to hear these reports coming in.
This would mark Jemma's fourth apperance as Kate Stewart in the show since her debut in The Power of Three and the signs are pointing to another return of UNIT.
Block 2 was also announced to be filming today with Blink director Helen McDonald returning to the directorial chair. The writers for this block is currently unknown at this present stage.
Doctor Who is set saling back onto our screens this August.