On stage, Scarborough has made frequent appearances at the Donmar, the Almeida, and in the West End and he has appeared in twenty productions for the Royal National Theatre. On 19 June 2011, he took part in The Barn Theatre presents... with Elliot Brown at the Barn Theatre, Welwyn Garden City Most recently he has appeared in Hedda Gabler at the Old Vic, again with frequent collaborator Sheridan Smith. In 2013, he played a role in Darkside, Tom Stoppard's radio drama based on Pink Floyd's album The Dark Side of the Moon.