 When this show was bought by ARD for the German market in 1967, only  selected episodes from the first three seasons were dubbed  (additionally the episodes were cut down to standard running time of  45 minutes). A few years later they did the same with the later  seasons (with new dubbing actors). When the show was broadcast on  Kabel 1/Pro 7, all other episodes (except one) were dubbed as well  (again with new dubbing actors). The last remaining episode was  dubbed for the DVD release in 2006.