The series was credited to the writer 'Justin Blake': this was in fact a pseudonym for the scriptwriters John Griffith Bowen and Jeremy Bullmore, who also wrote some novelisations of the Garry Halliday TV stories under the same name.
During the run of the series actor Bill Kerr, playing new co-pilot character Eddie Robbins, replaced Terence Alexander.
[3] Although Brook-Jones did subsequently return to the role, his death in September 1962 meant that The Voice was written out of a planned appearance in the programme's final episode that month.
[4] Location filming took place at Ferryfield Airport in Lydd, Kent, with the offices and planes of Silver City Airways transformed for the first few serials.
[9] Garry Halliday makes an appearance in The Black Dossier by Alan Moore, his name slightly altered to Gary Haliday, encountering Mina Murray and Allan Quatermain in a new spaceport in Birmingham.