Mother-Son Producer Duo Revealed as Murderers in Season Finale of 'Only Murders in the Building'

Donna and her son Cliff are arrested for the murder of actor Ben Glenroy, who was poisoned and pushed down an elevator shaft.
Mabel figures out that Cliff actually pushed Ben after overhearing a conversation between Dickie and Loretta.
The season 3 finale ends with a fakeout - Charles' stunt double Sazz is murdered, setting up season 4.
Despite solving the murder, the trio realizes they didn't have the full story.
The show has been renewed for a fourth season, but production is on hold due to an actors' strike.