Series 4

1. Theory

1968-09-12 · 50m

The No. 11 District squad has just completed a rearrangement of their Headquarters accommodation, taking over the house next door to provide extra space; and to bring Gilbert and Barlow into closer proximity with Watt and his team.

2. Proof

1968-09-19 · 50m

3. Bird Of Passage

1968-09-26 · 50m

4. See The Rabbit

1968-10-03 · 50m

5. Take Them In Singles

1968-10-10 · 50m

6. Red Herring

1968-10-17 · 50m

7. Five Pairs O' Hands

1968-10-24 · 50m

8. Minor Incident

1968-10-31 · 50m

9. An Old Song

1968-11-07 · 50m

10. Big Boats, Little Boats

1968-11-14 · 50m

11. For A Rainy Day

1968-11-21 · 50m

12. Assistance

1968-11-28 · 50m

13. Equal Status

1968-12-05 · 50m

14. Obstruction

1968-12-12 · 50m

15. Going Quietly

1968-12-19 · 50m

16. On Christmas Day In The Morning

1968-12-27 · 50m

17. Departure

1969-01-02 · 50m

18. Cross Reference

1969-01-09 · 50m

19. Run For The Hills

1969-01-16 · 50m

20. Pressure

1969-01-23 · 50m

21. A Quantity Of Gelignite

1969-01-30 · 50m

22. Critical Path

1969-02-06 · 50m

23. Persistence

1969-02-13 · 50m

24. Second Chance

1969-02-20 · 50m

25. How's The Wife Then ?

1969-02-27 · 50m

26. Right To Search

1969-03-06 · 50m

27. Proved Connection

1969-03-13 · 50m