'No Exit' At the St Martin's. Peter Wilding (Robert Douglas) Is Shown Unpacking His Runk-Load of the 'Encyclopaedia Britannica'. the Thunderous Detonation Has Disturbed the Spring of the Secret Panel and It Yawns Open! Neither Beeston, Teh Detective (Cyril Howard; Left), Nor Laura Anstey (Gillian Lind; Right) Feels the Least Like Yawning In Sympathy