 In 2006 Boulter starred in the play Citizenship written by Mark Ravenhill . The play was part of a series which featured different playwrights , titled Burn / <unk> / Citizenship . In a 2006 interview , fellow actor Ben Whishaw identified Boulter as one of his favorite co @-@ stars : " I loved working with a guy called Robert Boulter , who was in the triple bill of Burn , <unk> and Citizenship at the National . He played my brother in Mercury Fur . " He portrayed " Jason Tyler " on the 2006 episode of the television series , Doctors , titled " Something I Ate " . Boulter starred as " William " in the 2007 production of How to Curse directed by Josie Rourke . How to Curse was performed at Bush Theatre in the London Borough of Hammersmith and Fulham . In a review of the production for The Daily Telegraph , theatre critic Charles Spencer noted , " Robert Boulter brings a touching vulnerability to the stage as William . " 
