Danger Man (titled Secret Agent in the United States, and Destination Danger and John Drake in other non-UK markets) is a British television series which was broadcast between 1960 and 1962, and again between 1964 and 1968. The series featured Patrick McGoohan as secret agent John Drake. Ralph Smart created the programme and wrote many of the scripts. Danger Man was financed by Lew Grade's ITC Entertainment.

Series 4 (1968)

4-1 "Koroshi"
An M9 agent is murdered in Tokyo while transmitting a message about the impending assassination of a United Nations mediator. Drake is assigned to protect the official.

4-2 "Shinda Shima"
Assigned to take the place of an electronics expert to infiltrate a Japanese murder brotherhood, Drake follows a trail to Shinda Shima ('the murdered island').

These two episodes, which were shot in colour, were broadcast in the US as the European cinema movie version, Koroshi. The show's abrupt cancellation, to make way for production and broadcast of star Patrick McGoohan's The Prisoner, resulted in these final two shows airing in the UK early in 1968, when they were broadcast as fill-in episodes for The Prisoner which had fallen behind the scheduled UK transmission dates, replacing advertised Prisoner episodes that were not yet ready for broadcast. They were originally intended to be broadcast after the finale of The Prisoner in the UK. Some parts of the UK, as well as the US, never saw the episodes in their original form until their DVD release.