Every season of Diabolical ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Diabolical!

49-year old Neal Jacobson is the image of success. Then one morning Neal is found covered in blood by a Florida roadside, claiming that he just killed his entire family. Is Neal Jacobson the victim or is he simply a cold-blooded killer?

Unhappy Birthday

When Christine Billis' car veers off the road and rams into a tree, her husband, Charles Billis, dies at the scene. Was Charles Billis' death a tragic accident or is his death the result of a diabolically premeditated plan?

Our Little Secret

David Messenger brutally murders his pregnant wife, Heather, in front of their 5-year-old son. The crime comes as a shock. Did he kill his wife in self-defense, did he fall victim to mental illness or was something even more disturbing going on?

Shattered

Pennsylvania native Janet Lynn Mickey's greatest dream is to start her own family. So, when she marries college football-star Darrell Tyburski her future seems secure. But when the couple has children, plans change leading them down the darkest path.

Mother of all Murders

Calculating. Cunning. Cold as ice. These shockingly devious masterminds use their wits and wiles to manipulate, seduce and try to get away with murder.

The Best Seasons of Diabolical

The Best Seasons of Diabolical

Season 1