The 39 Steps is a play adapted from the 1915 novel by John Buchan and the 1935 film by Alfred Hitchcock. Patrick Barlow wrote the adaptation, based on the original concept by Simon Corble and Nobby Dimon of a two-actor version of the play. Barlow had originally intended to portray the character of Richard Hannay, but focused solely on rewriting the original version.
Richard Hannay, the protagonist and narrator, an expatriate Scot, returns from a long stay in Southern Africa to his new home, a flat in London. One night he is buttonholed by a stranger, a well-traveled American, who claims to be in fear for his life. The man appears to know of an anarchist plot to destabilize Europe, beginning with a plan to assassinate the Greek Premier, Karolides, during his forthcoming visit to London. He reveals his name to be Franklin P. Scudder. Hannay lets Scudder hide in his flat, and returns later the next day to find that another man has been found shot dead in the same building, apparently a suicide. Four days later Hannay returns home to find Scudder dead with a knife through his heart. Hannay fears that the murderers will come for him next, but cannot ask the police for help because he is the most likely suspect for the murders. Not only does he want to avoid imprisonment, but he also feels a duty to take up Scudder's cause and save Karolides from the assassination, planned in three weeks' time. He decides to go into hiding in Scotland and then to contact the authorities at the last minute. In order to escape from his flat unseen, he bribes the milkman to lend him his uniform and exits wearing it. Carrying Scudder's pocket-book, he catches a train to Scotland. If you are looking for a great spoof on a thriller 39 Steps tickets will not miss.