1. The Rajah's Ruby

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. 27 June 1977. 40 min

It's 1925, and a daring thief makes off with a precious gemstone.

2. Village Fate

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. 4 July 1977. 40 min

Rehearsals for a murder mystery play turn sinister when one of the actors is poisoned for real.

3. No Happy Returns

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. 11 July 1977. 40 min

Seventieth birthday celebrations for a bad-tempered Chairman of the Board end with a bang!

4. The Q43 Experiment

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. 18 July 1977. 40 min

A top British scientist is gunned down as he works in his laboratory.

5. Last Tango in Tooting

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. 25 July 1977. 40 min

It's the finals of the Banworth Chemical Works dance competition and there's murder on the dancefloor.