The read
7 seasons across 39 episodes so far, still running.
Ratings
TMDB8/10
2 audience votes
Seasons
| 1 | Season 1 | 9 ep1975 |
| 2 | Season 2 | 7 ep1976 |
| 3 | Season 3 | 6 ep1977 |
| 4 | Season 4 | 5 ep1978 |
| 5 | Season 5 | 6 ep1979 |
| 6 | Season 6 | 4 ep1980 |
| 7 | Season 7 | 2 ep1981 |
7 seasons across 39 episodes so far, still running.
2 audience votes
| 1 | Season 1 | 9 ep1975 |
| 2 | Season 2 | 7 ep1976 |
| 3 | Season 3 | 6 ep1977 |
| 4 | Season 4 | 5 ep1978 |
| 5 | Season 5 | 6 ep1979 |
| 6 | Season 6 | 4 ep1980 |
| 7 | Season 7 | 2 ep1981 |