(1 Oct 1990) – Season 4 Episode 2 (Serial 178)

#81 – Release: 29 Apr 1981

(24 Sep 1990) – Season 4 Episode 1 (Serial 175)

#80 – Release: 29 Sep 1986

(18 Jun 1990) – Season 3 Episode 26 (Serial 174)

#79 – Release: 20 Jul 1981

(4 Jun 1990) – Season 3 Episode 25 (Serial 173)

#78 – Release: 20 Jul 2024

(28 May 1990) – Season 3 Episode 24 (Serial 172)

#77 – Release: 23 Mar 1983