It is the early 1980's. Ludwig Kessler, the SS Standartenführer who was one of the central characters in the 70's classic TV series "Secret Army", is now (in the early 80's), living under a pseudonym, a successful and respectable industrialist. But a Belgian TV Journalist with little or no scruples, a German Detective, and an Israeli out to avenge her parents are all on to his true identity, and are trying to track him down.
Lovers of conspiracy theories will latch on to the allusions to Nazi escape networks exploiting Masonic-like connections throughout the establishment, neo-Nazi movements ready to take over the world and the like. It all sounds a little far-fetched now, but was very topical at the time Kessler was originally released. Certainly there were rumours at the time that the series might have been closer to the truth than originally thought!
It is almost inevitable that comparisons will be drawn with "Secret Army", and to be honest, "Kessler" comes in a clear runner up. Set in contemporary time, "Kessler" suffers from appearing almost cringingly "80's" at times, something "Secret Army", set in the past at the time of release, avoids. Kessler himself is the only real carry-over character - although Bernard Hepton, Angela Richards and Juliet Hammond-Hill get to reprise their roles briefly in the first episode. The six episode, single series format does not allow for the depth of characterisation and plot "Secret Army" had over its three 13 episode seasons - and that contributed to its greatness. Consequently, "Kessler" appears rather one-dimensional in comparison.
"Kessler" stands on its own as a very good, taut, well-scripted Drama. Unlike many spin-offs, in-depth knowledge of the original series is not a requirement for getting into and enjoying it. However, like many spin-offs, "Kessler" does not live up to the original.