Broadcast years[]
Episodes have had their first transmission on 1 January in the following years:
| 73 - 96 |
1973, 1974, 1991 Series: 1, 2, 19
|
| 97 - 09 |
1997, 1998, 2001, 2002, 2004, 2006, 2007, 2008, 2009
|
| 2010's |
2010
|
Episodes[]
| KEY
|
| 1973 to 1996
|
Clear boxes denote the date is between series'
|
| Grey boxes denote the date is between seasons
|
| 1997 onwards
|
Colour means an episode would normally transmit
|
20th Century[]
Episodes shown from 1973 to 1999 are listed in the following table:
21st Century[]
Episodes shown since 2000 are listed in the following table:
