Series 5, Episode 6 | 1 part | First broadcast: 8 May 2010 […]
Series 4, Episode 6 | 1 part | First broadcast: 10 May 2008 […]
Series 3, Episode 6 | 1 part | First broadcast: 5 May 2007 […]
Series 2, Episode 6 | 2 parts | First broadcast: 20 May 2006 […]
Specials, Episode 6 | 1 part | First broadcast: 15 November 2009 | […]
Season 22, Episode 6 | 2 parts | First broadcast: 23–30 March 1985 […]
Season 21, Episode 6 | 4 parts | First broadcast: 8–16 March 1984 […]
Season 20, Episode 6 | 2 parts | First broadcast: 15–16 March 1983 […]
Season 19, Episode 6 | 4 parts | First broadcast: 8–16 March 1982 […]
Season 18, Episode 6 | 4 parts | First broadcast: 31 January – […]