Several radio drama series were produced in North America, Ireland, and Britain. The earliest was for Radio Eireann in 1940 and starred Terence De Marney. Both NBC and CBS produced Saint series during 1945, starring Edgar Barrier and Brian Aherne. Many early shows were adaptations of published stories, although Charteris wrote several storylines for the series which were novelised as short stories and novellas. The longest-running radio incarnation was Vincent Price, who played the character in a series between 1947 and 1951 on three networks: CBS, Mutual and NBC. Like The Whistler, the program had an opening whistle theme with footsteps. Some sources say the whistling theme for The Saint was created by Leslie Charteris while others credit RKO composer Roy Webb.