Carvel has appeared in several other film, TV and theatre roles, including The Wrong Mans, Babylon, Doctor Who (episode "The Lazarus Experiment"), Sherlock (episode "The Blind Banker"), Bombshell, Hawking, The Crimson Petal and the White, Money and Midsomer Murders (episode "The Great and the Good"). He played Lord Carmarthen in John Adams. In the television film Agatha Christie: A Life in Pictures, he played Christie's second husband Max Mallowan.