Season 4 (1972)
Release date: 1972-09-13
Episodes (20):
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1. Spit and Polish
Release date: 1972-09-13
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2. Killer
Release date: 1972-09-20
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3. Surveillance
Release date: 1972-09-27
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4. Dog Eat Dog
Release date: 1972-10-04
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5. Bank Rate
Release date: 1972-10-11
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6. On the Third Day
Release date: 1972-10-18
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7. The Witness
Release date: 1972-10-25
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8. Run for your Money
Release date: 1972-11-01
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9. New Broom
Release date: 1972-11-08
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10. Paper Chase
Release date: 1972-11-15
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11. Welcome to the Club
Release date: 1972-11-22
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12. Justice
Release date: 1972-11-29
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13. Conversion
Release date: 1972-12-06
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14. Needle
An unpopular prison warden is run down outside the prison gates. Watt believes he knows which prisoner was behind it but he has to find the driver.
Release date: 1972-12-13
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15. Execution
Release date: 1972-12-20
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16. Time-Table
Release date: 1973-01-03
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17. Conspiracy
Release date: 1973-01-10
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18. Money for Sale
Release date: 1973-01-17
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19. For Love or Money
Release date: 1973-01-24
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20. Little Acorns
Release date: 1973-01-31
