Season 4 aired between 26 Jan 1977 and 13 Dec 1977, 18 episodes.
Episodes
E01
Episode 1
26 Jan 1977
E02
Episode 2
02 Feb 1977
E03
Episode 3
02 Mar 1977
E04
Episode 4
30 Mar 1977
E05
Episode 5
13 Apr 1977
E06
Episode 6
27 Apr 1977
E07
Episode 7
22 May 1977
E08
Episode 8
27 May 1977
E09
Episode 9
08 Jun 1977
E10
Episode 10
14 Aug 1977
E11
Episode 11
20 Sep 1977
E12
Episode 12
04 Oct 1977
E13
Episode 13
18 Oct 1977
E14
Episode 14
01 Nov 1977
E15
Episode 15
14 Nov 1977
E16
Episode 16
15 Nov 1977
E17
Episode 17
29 Nov 1977
E18
Episode 18
13 Dec 1977