The play, which charts the events leading up to the only military coup in British history, will be directed by Howard Davis. The political upheaval of the mid-seventeenth century has no parallel in English history. In these dangerous and dramatic times, in a country exhausted by Civil War, the great men of the day were trying to think the unthinkable — to create a country without a king. With Charles I refusing to compromise, Oliver Cromwell struggled to invent a political future for his country as he presided over the death of medieval England and the birth of the modern state. 
Gatiss was seen most recently onstage in The Recruiting Officer at the Donmar Warehouse. Other theatre credits include Season's Greetings at the National Theatre and All About My Mother at the Old Vic. His TV credits include Mycroft Holmes in the BBC's "Sherlock" and an original member of The League of Gentlemen comedy troupe.

To book tickets contact the box office on 020 7722 9301 or visit hampsteadtheatre.com for more details.