19 Jan 1972First aired
1Season
The series
Sixth-former Martin Clifford is plunged into the world of espionage and sabotage when he and his class see schools programmes from "The Voice of Truth". Forrester, an Intelligence officer, informs him that spies are planning to sabotage a local US Airforce base in his village. Can he identify "The Voice of Truth" in time?
Episodes
Season 1 · 13 episodes · 1972
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Episode 119 Jan 197230m
Episode 1
In the town of Redlow an A level student is persuaded to help expose enemy spies.
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Episode 226 Jan 197230m
Episode 2
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Episode 32 Feb 197230m
Episode 3
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Episode 49 Feb 197230m
Episode 4
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Episode 516 Feb 197230m
Episode 5
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Episode 623 Feb 197230m
Episode 6
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Episode 71 Mar 197230m
Episode 7
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Episode 88 Mar 197230m
Episode 8
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Episode 915 Mar 197230m
Episode 9
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Episode 1022 Mar 197230m
Episode 10
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Episode 1129 Mar 197230m
Episode 11
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Episode 125 Apr 197230m
Episode 12
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Episode 1312 Apr 197230m
Episode 13
Cast
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