Death at the Dolphin (Killer Dolphin) (1967)

The unearthing of a priceless Shakespearean prop inspires a hit play, the reopening of a jewel box theater -- and a grisly robbery-murder.

The celebrated cast members are the prime suspects of Scotland Yard's ingenious Inspector Alleyn -- who must wend his way through shadowy backstage romance and rivalry before he can bring down the curtain on the guilty party.