1. Death of a Crab

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. 25 February 1974. 60 min

Cynical detective David Gradley meets sassy astrologer Esther Jones, first suspecting her of murder, then finding her skills useful in clearing up an intriguing case.

2. The Cool Aquarian

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. 4 March 1974. 60 min

Jealousy, highly unethical business practises and the kidnap of a young woman stretch Gradley's analytical powers, and Esther's astrological skills, to the full. Neville the butler provides both comic relief and human insight to the case.

3. The Strength of Gemini

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. 11 March 1974. 60 min

Furious that a conman is using her astrological skills to target his victims, Esther inveigles Gradley into a plot to unmask the rogue.

4. Saturn's Rewards

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. 18 March 1974. 60 min

An MP's daughter wants to marry a man the MP knows is a murderer – but he can't reveal what he knows without jeopardising himself.

5. Sting, Sting, Scorpio!

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. 25 March 1974. 60 min

Very much against Gradley's wishes, Esther takes the place of a murdered Brighton astrologer and clairvoyant in order to find out who killed her – thus exposing herself to the same risk.

6. The Horns of the Moon

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. 1 April 1974. 60 min

When Tony Weston is accused of the murder of his father, CEO of a merchant bank, Esther is sure he's innocent – his birth chart proves him incapable of any such violence. With four other possible suspects, finding the real culprit might be tricky.