Phil Corrigan comics originally started as Secret Agent X-9 by writer Dashiell Hammett (The Maltese Falcon) and artist Alex Raymond (Flash Gordon). Syndicated by King Features, it ran from January 22, 1934 until February 10, 1996. X-9 was a nameless agent who worked for a nameless agency. X-9 used the name "Dexter" in the first story ("It's not my name, but it'll do.") and kept using it or being called by it in later stories, but acquired the name "Phil Corrigan" in the 1940s. Decades later, the strip was renamed Secret Agent Corrigan.
