Season 4
20 episodes ยท premiered Sep 13, 1972
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E1 Spit and Polish
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E2 Killer
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E3 Surveillance
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E4 Dog Eat Dog
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E5 Bank Rate
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E6 On the Third Day
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E7 The Witness
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E8 Run for your Money
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E9 New Broom
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E10 Paper Chase
A search is on for a couple who are flooding shops with fake one pound notes. Market stallholder Ben Fisher attempts to get his money back by using local dog track.
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E11 Welcome to the Club
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E12 Justice
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E13 Conversion
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E14 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.
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E15 Execution
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E16 Time-Table
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E17 Conspiracy
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E18 Money for Sale
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E19 For Love or Money
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E20 Little Acorns