Season 12 aired between 11 Jan 1981 and 13 Dec 1981, 12 episodes.
Episodes
E01
Episode 1
11 Jan 1981
E02
Episode 2
08 Feb 1981
E03
Episode 3
08 Mar 1981
E04
Episode 4
20 Apr 1981
E05
Episode 5
03 May 1981
E06
Episode 6
31 May 1981
E07
Duisburg-Ruhrort
28 Jun 1981
E08
Episode 8
23 Aug 1981
E09
Episode 9
13 Sep 1981
E10
Episode 10
18 Oct 1981
E11
Episode 11
15 Nov 1981
E12
Episode 12
13 Dec 1981