'Death at Broadcasting House' (1934) – Reginald Denham. 

The querulous, and frequently catty cast of a lurid radio play distressingly find them crime, as one of them is murdered by malevolent persons unknown! Sleekly suave Det. Inspector Gregory (Ian Hunter) is called upon to investigate the dastardly strangler in this splendidly entertaining 1930s whodunnit, greatly enlivened by a remarkably droll text, and many colourfully 'theatrical' performances from an amusingly stiff upper-lipped cast of mellifluously erudite British Thespians, including a very young and dashingly handsome Jack Hawkins! 'Death at Broadcasting House is ripping good yarn, energetically told by a fine ensemble cast of actors. 'Murder Immaculate indeed!' This consistently engaging thriller works splendidly as escapist entertainment, and is doubly fascinating as a delightfully vivid document of the frightfully middle-class milieu of Broadcasting House in the 1930s, and it's truly wonderful to know that such beautifully made 30s-era films are still available for future generations of thriller fans to enjoy.