Casting directory Spotlight has revealed that actor Adrian Scarborough (pictured left) will be starring in Doctor Who Series 7. Known for Gavin & Stacey and Upstairs Downstairs, he will be playing a character called Kahler Jex in an episode directed by Saul Metzstein. Currently, Matt Smith, Karen Gillan and Arthur Darvill have headed out to Spain to continue filming on the series, due to start airing in the autumn. PLEASE NOTE: SPOILERS to follow. The same site has revealed some information about the character that Mark Williams will be playing. PLEASE NOTE: SPOILERS to follow. According to Spotlight, the actor will be playing a character called Brian Williams.