Rumpole of the Bailey interest in nineteenth-century anarchists, especially the Russian Peter Kropotkin from whom the title of the play was drawn. The character's name was later changed to Horace Rumpole when it was discovered that there was a real barrister called Horace Rumbold. The title of the play was briefly changed to "Jolly Old Jean Jacques Rousseau" before settling on the less esoteric "Rumpole of the Bailey". Mortimer was keen on Michael Hordern for the role of Rumpole. When Hordern proved unavailable, the part went to Australian-born actor Leo McKern. Mortimer was initially unenthusiastic about McKern's casting but changed his opinion upon seeing
Leo McKern acclaimed TV series "The Prisoner". Along with Colin Gordon, McKern was one of only two actors to play Number Two more than once. He first played the character in the episodes "The Chimes of Big Ben" and "Once Upon a Time", and later reprised the role in the final episode, "Fall Out". The filming of "Once Upon a Time" proved to be a particularly intense experience for McKern; according to one biographer, the stress caused him to suffer either a nervous breakdown or a heart attack (accounts differ), forcing production to stop for a time. In 1976 McKern narrated and