First draft
Episodes were shown on 5 April as follows:
| Episode | Year |
| EF0311 | 1976 (Series 4) |
| EF0516 | 1979 (Series 7) |
| EF0868 | 1984 (Series 12) |
| EF1339 | 1989 (Series 17) |
| 01443 | 1990 (Series 18) |
| 01857 | 1994 (Series 22) |
| 02676 | 2000 |
| 02888 | 2001 |
| 03149 | 2002 |
| 03705 | 2004 |
| 04016 | 2005 |
| 04328 | 2006 |
| 04642 | 2007 |
| 05574 | 2010 |
| 05886 | 2011 |
| 06204 | 2012 |
| 06205 | 2012 |