Series 1
4 episodes transmitted between 13 Jul 63 and 24 Aug 63
Series 2
10 episodes transmitted between 6 Oct 63 and 12 Apr 64
Special
Untitled (4 Dec 64)
Series 3
7 episodes transmitted between 2 Oct 65 and 13 Nov 65
Series 4
13 episodes transmitted between 10 Aug 66 and 2 Nov 66
Series 5
9 episodes transmitted between 3 Apr 67 and 5 Jun 67
Series 6
6 episodes transmitted between 4 Dec 67 and 15 Jan 68
Series 7
9 episodes transmitted between 7 Jan 69 and 7 Mar 69
Series 8
10 episodes transmitted between 3 Apr 70 and 11 Jun 70
Series 9
10 episodes transmitted between 5 Mar 71 and 7 May 71
Series 10
13 episodes transmitted between 1 Jan 72 and 25 Mar 72
Series 11
11 episodes transmitted between 10 Mar 73 and 26 May 73
Series 12
10 episodes transmitted between 5 Oct 74 and 14 Dec 74
Special
Untitled (24 Dec 74)
Series 13
11 episodes transmitted between 30 Aug 75 and 15 Nov 75
Special
Untitled (24 Dec 75)
Series 14
8 episodes transmitted between 7 Sep 76 and 26 Oct 76
Series 15
8 episodes transmitted between 3 Sep 77 and 22 Oct 77
Special
Untitled (24 Dec 77)
Series 16
6 episodes transmitted between 17 Feb 79 and 24 Mar 79
Series 17
6 episodes transmitted between 5 Jan 80 and 9 Feb 80
Special
Untitled (27 Dec 80)
Series 18
6 episodes transmitted between 3 Jan 81 and 7 Feb 81