Clever Dick, a farce about the American physicist Richard Feynman and The Manhattan Project, was produced at Hampstead Theatre in 2006 in a production directed by Whittell.
[1] Whittell was then commissioned by Roger Rees to write Villa America about the American socialite couple Gerald and Sara Murphy, and their relationship with Pablo Picasso, F. Scott Fitzgerald and Ernest Hemingway.
[2] Other produced plays include Killing Him (Pleasance Edinburgh), and Party Tricks (Nottingham Playhouse) directed by Martin Clunes.
The Primrose Path - Whittell's adaptation of Turgenev's novel Home of the Gentry - opened at the Guthrie Theater in May 2013 in a production directed by Roger Rees.
In April 2013 he directed the World Premiere of Adam Rapp's play The Purple Lights of Joppa Illinois at South Coast Repertory Theatre.