First feature film outing for novelist Dorothy L. Sayer's popular
amateur detective Lord Peter Wimsey. The Silent Passenger was an original
story written by Sayers specifically for the screen; unfortunately her
amateur sleuth is portrayed as something of an eccentric twit who solves
murders in spite of himself.
A scurrilous blackmailer is murdered by the husband one of his victims,
railroad detective Henry Camberley (Donald Wolfit), but it is the innocent
John Ryder (John Loder) who is suspected of the crime when Camberley
stuffs the dead body into his trunk. Making the casual acquaintance
of Ryder, Lord Peter Wimsey (Peter Haddon) sets about to prove his new
friend's innocence. It all takes place on a train trip from London to
the English Channel, with Ryder acting as bait to flush out the real
killer.