Sezon 4
Bölümler
1 Nowhere to Go 27 Kas 1970 
2 The Canteen Girl 4 Ara 1970 
3 Dangerous Driving 11 Ara 1970 
4 The Other Woman 18 Ara 1970 
5 Christmas Duty 25 Ara 1970 
6 The 'L' Bus 1 Oca 1971 
7 The Kids' Outing 10 Oca 1971 
8 The Anniversary 17 Oca 1971 
9 The Cover Up 24 Oca 1971 
10 Safety First 31 Oca 1971 
11 The Lodger 7 Şub 1971 
12 The Injury 14 Şub 1971 
13 Not Tonight 21 Şub 1971