I found this to be a good collection of the remaining B & W episodes of Callan. It comprises the Armchair Theatre pilot which was so well received that several series were subsequently made, and what's left of series one and two. Overall the visual quality is good, apart from a few slight glitches here and there which are not enough to detract from the viewing experience. The stories are good, including some stories set in Britain, and a few excursions onto the Continent.
It is well written and well acted. The production is minimalist, lacking the excessive dialogue, lavish sets and multiple explosions of modern-day "spy" adventures. This suits me, as it concentrates on the characters and storylines.
The indoor scenes are typical of early TV, resembling filmed stage productions.
The sets and settings are representative of the 1960's. The black and white format suits the nostalgic scenery as well as the espionage theme.
Callan is well played by Edward Woodward, who explores not only the dilemma of duty conflicting with his personal feelings (a reluctance to kill without knowing the reasons, a quality sometimes exploited by the "Section" he works for) , but also shows a softer human side, when he becomes romantically involved with a lady.
The other main characters; Hunter, Meres and Lonely, are also well acted.
Overall it is a good 10 hours or so of classic (and previously unreleased on privately viewable media) Callan which is easily enjoyed, particularly by a Callan fan.