Murphy's Law is a BBC television drama, produced by Tiger Aspect Productions for BBC Northern Ireland, starring James Nesbitt as an undercover police officer, Tommy Murphy. There were five series of the drama, shown on BBC One. The first two were composed of individual stories. Series three, four and five were each single stories composed over multiple episodes. Colin Bateman adapted the pilot for a novel.

BBC Northern Ireland is a division of the BBC and the main public broadcaster in Northern Ireland. It is widely available across both Northern Ireland and the Republic of Ireland.