The series was canceled after 18 seasons and 192 episodes.
Ratings
| Source | Rating |
|---|---|
| IMDb | 7.3/10 |
| TMDB | 9.3/103 votes |
Seasons
| 1 | Season 1 | 6 ep1971 |
| 2 | Season 2 | 10 ep1972 |
| 3 | Season 3 | 10 ep1973 |
| 4 | Season 4 | 10 ep1974 |
| 5 | Season 5 | 10 ep1975 |
| 6 | Season 6 | 10 ep1976 |
| 7 | Season 7 | 10 ep1977 |
| 8 | Season 8 | 10 ep1978 |
| 9 | Season 9 | 10 ep1979 |
| 10 | Season 10 | 10 ep1980 |
| 11 | Season 11 | 10 ep1981 |
| 12 | Season 12 | 10 ep1982 |
| 13 | Season 13 | 10 ep1983 |
| 14 | Season 14 | 10 ep1984 |
| 15 | Season 15 | 10 ep1985 |
| 16 | Season 16 | 7 ep1986 |
| 17 | Season 17 | 29 ep2011 |
| 18 | Season 18 | 10 ep2013 |
Key crew
- Hans RosenthalCreator
- Inge LetzDirector