Season 4
Episodes
1 Return to Thundera (1) Sep 4, 1989 
2 Return to Thundera (2) Sep 5, 1989 
3 Return to Thundera (3) Sep 6, 1989 
4 Return to Thundera (4) Sep 7, 1989 
5 Return to Thundera (5) Sep 8, 1989 
6 Leah Sep 11, 1989 
7 Frogman Sep 12, 1989 
8 The Heritage Sep 13, 1989 
9 Screwloose Sep 14, 1989 
10 Malcar Sep 15, 1989 
11 Helpless Laughter Sep 18, 1989 
12 Cracker's Revenge Sep 19, 1989 
13 The Mossland Monster Sep 20, 1989 
14 Ma-Mutt's Confusion Sep 21, 1989 
15 Shadowmaster Sep 22, 1989 
16 Swan Song Sep 25, 1989 
17 Touch of Amortus Sep 26, 1989 
18 The Zaxx Factor Sep 27, 1989 
19 Well of Doubt Sep 28, 1989 
20 The Book of Omens Sep 29, 1989