Married to a Psychopath - Season 1 Episode 2 -

The covert investigation into Malcolm Webster in light of evidence that he attempted to kill his second wife in similar circumstances to his first wife's death over a decade before. As Webster targets his third victim, a wealthy nurse whom he plans to bigamously marry, time is running out for the investigating officers as they learn that the bride and groom will be honeymooning aboard a yacht sailing into international water.