In many ways 'Ringer', the first episode proper of 'The Sweeney', was not substantially improved on.in subsequent ones.
It introduces us to many 'Sweeney' trademarks, with its colourful assortment of villains and the 'networking' which was an integral part of life for those on both sides of the fence, We also gain some insight into how these activities impacted other people.
I really like the gritty feel of 'Ringer',enhanced by the camera-work, the settings and the visuals generally.
Ian Hendry, Brian Blessed and Alan Lake make for an intriguing trio of villains, all very different from each other but without descending into cliche. There is some great banter between the three of them.
Regan's relations with his superiors are also put under the spotlight, although his exchanges with Haskins seem harsher and more abrasive than they would generally be in subsequent episodes.
The acting is primarily of a high quality, and there are some entertaining and impactful performances by those in minor roles, such as June Brown and Ray Mort. There is also plenty of humour in between the darker and more menacing moments.
In terms of atmosphere, the building of suspense and so forth, this is possibly one of the stronger episodes of the show. Snappy dialogue and editing contribute to this.
So, all in all, a fine episode which set the standard for later ones to follow.