I was a big fan of this show when series 3 and 4 were shown in the early 70's, but was too young to remember series 1 and 2 so was intrigued to now be able to watch these for the first time. There is certainly a marked difference between them - the video taped ones have extensive dialogue and are an interesting example of how TV drama was developing at the turn of the seventies. With the exception of Derren Nesbitt, Fulton Mackay and Wensley Pithey, some of the acting is rather wooden at times. The Euston Films series are much more hard hitting and show a grittier London of the early seventies which The Sweeney developed later. George Sewell, Patrick Mower, Paul Eddington and Frederick Jaeger all put in good performances. All in all, a good slice of TV drama from the non-technical age. And of course, the cars bring back memories too!