Season 4 Episodes
1. Theory
September 12th, 1968
50 min
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
September 19th, 1968
50 min
3. Bird Of age
September 26th, 1968
50 min
4. See The Rabbit
October 3rd, 1968
50 min
5. Take Them In Singles
October 10th, 1968
50 min
6. Red Herring
October 17th, 1968
50 min
7. Five Pairs O' Hands
October 24th, 1968
50 min
8. Minor Incident
October 31st, 1968
50 min
9. An Old Song
November 7th, 1968
50 min
10. Big Boats, Little Boats
November 14th, 1968
50 min
11. For A Rainy Day
November 21st, 1968
50 min
12. Assistance
November 28th, 1968
50 min
13. Equal Status
December 5th, 1968
50 min
14. Obstruction
December 12th, 1968
50 min
15. Going Quietly
December 19th, 1968
50 min
16. On Christmas Day In The Morning
December 27th, 1968
50 min
17. Departure
January 2nd, 1969
50 min
18. Cross Reference
January 9th, 1969
50 min
19. Run For The Hills
January 16th, 1969
50 min
20. Pressure
January 23rd, 1969
50 min
21. A Quantity Of Gelignite
January 30th, 1969
50 min
22. Critical Path
February 6th, 1969
50 min
23. Persistence
February 13th, 1969
50 min
24. Second Chance
February 20th, 1969
50 min
25. How's The Wife Then ?
February 27th, 1969
50 min
26. Right To Search
March 6th, 1969
50 min
27. Proved Connection
March 13th, 1969
50 min
