The Creeper

A cat burglar is on the loose, one known as "the Creeper", but the wave of burglaries they have committed, seem to have finally led to murder, when David Roper (Rik Mayall) is found smothered in his bed on the Chettham family estate. Yet Barnaby and Jones learn he may have been planning to write a book that could have been quite uncomfortable for someone, leading the pair to determine whether members of the Chettham family, or their friends, were responsible.