Dennis Neilson-Terry

When a 'man about town' takes a young lady back to his house they are both surprised to find that it has been turned into an illegal casino in his absence.

Retired actress poses as dresser to scare murderer into confessing and clearing her son.

In Dijon, Inspector Hanaud investigates Betty Harlowe after her uncle, Boris Waberski, accuses her of poisoning her wealthy aunt for an inheritance. While an initial autopsy finds nothing, Hanaud discovers the use of Strophanthus Hispidus—a rare, undetectable poison applied via an antique arrow. Amidst a flurry of "poison pen" letters and deception, Hanaud proves the murder occurred despite the lack of conventional medical evidence.

'Lady marries horse trainer but withholds herself until crippled brother is cured.' (British Film Catalogue)

A detective goes undercover and poses as a criminal to try to discover the reasons behind the murder of a night club owner.