Danger Man, later Secret Agent (also shown as Destination Danger), was a British television series broadcast between 1960 and 1962, and again between 1964 and 1968. This series featuring Patrick McGoohan as secret agent John Drake. Ralph Smart created the program and wrote many of the scripts. There has never been a full explanation of the relationship between Smart and McGoohan. McGoohan has never spoken about Ralph Smart in any detail. They did have face-to-face meetings at the beginning of the project, at which they fleshed out the character of John Drake. The degree to which McGoohan changed Smart's original ideas is unclear; that he did change them is accepted. However, it must be remembered that Smart evidently agreed to the changes and continued to be enthusiastic about his creation. Danger Man was financed by Lew Grade's ITC Entertainment. In the United States, CBS broadcast the series under the Danger Man title for the first season, and under the Secret Agent title for the second and third seasons. The two final episodes of the series often are presented as the television film Koroshi. "Secret Agent Man" is the title of the series' theme song, though often mistakenly applied to the series itself.

John Drake was a special operative for NATO, specializing in security assignments against any subversive element that threatened world peace. The series featured exotic locales from all over the world, but it was relatively down-to-earth and realistic--especially when compared to its successor, "Secret Agent". Written by Marg Baskin

Three years after the original "Danger Man" series concluded, it was revamped and continued in a longer format. (1 hour/episode instead of 30 minutes). John Drake was now a Special Security Agent for MI9, getting his exotic assignments exclusively from Her Majesty's Secret Service. This version of the series introduced far more Bond-like gadgets, from exploding tie-pins to tape-recording shavers, and emphasized fast action. Written by Marg Baskin