One Night Stand is the 15th episode in the series.

Plot synopsis

Whilst Martin is at a works conference at a hotel in Bruges, obnoxious young colleague Rex Tynan gets him drunk and plants a young woman in his hotel room, leading him to believe he has been unfaithful to Ann. Though incredulous Ann has her doubts when Martin tells her, but fortunately Paul comes to the rescue by tricking Tynan into telling her the truth. Martin is restrained but Howard takes more direct action.