Complex sentence: The two episodes were first broadcast in January and December 1972 and were shot entirely on film and mostly on location in Bavaria, with the first episode recorded in the German language and the second recorded in English and then dubbed into German.
Split into simpler sentences: The two episodes were first broadcast in January and December 1972, respectively. They were shot entirely on film, mainly on location in Bavaria and in the German language, although the second episode was originally recorded in English and then dubbed into German.