It was broadcast in the UK on ITV (Scottish Television) on Thursday 18 January 1968 (and a day later on ATV Midlands and Grampian) and aired in the United States on CBS on 7 September 1968.

[3] According to several sources, including The Prisoner by Robert Fairclough, this episode was adapted from an unused, two-part script originally commissioned for Danger Man.

Number Six is on an operational assignment, but it is unclear whether this is "real time", pre-The Village, or possibly another induced hallucination.

In a record shop, he receives an assignment to find a Professor Schnipps who has been working on a rocket that will destroy all of London.

Number Six dresses up in a Sherlock Holmes costume with deerstalker hat and cape, with moustache and mutton chop sideburns.

Eventually, after faking his death, Number Six tracks Sonia to a lighthouse where Schnipps (dressed as Napoleon) and his associates are based.

His lieutenants are dressed in Grande Armée uniforms and represent an apparently anti-London alliance composed of Scottish, Welsh, Irish, and Northern (particularly Yorkshire) marshals.

As a result, ATV Midlands took a two-week hiatus from broadcasting The Prisoner after airing "Living in Harmony" on 29 December 1967.

The final two colour episodes of Danger Man (its abbreviated fourth season) that had originally been planned to air after "Fall Out" were brought forward and screened on ATV Midlands and Grampian on Friday 5 and 12 January 1968.