The show was originally broadcast in black and white and shown on the regional channel of the North Rhine-Westphalia area, WDR. It moved to Germany's first channel, ARD, on New Year's Eve 1973 with the above-mentioned episode and from that date was produced in colour. Some of the colour episodes are actually remakes or reprises of older black-and-white episodes. The first series is considered to consist of 21 episodes. For the second series, Elisabeth Wiedemann, extremely popular in her role as Else Tetzlaff, was replaced by Helga Feddersen and Michael, formerly played by Diether Krebs, was portrayed by Klaus Dahlen.