Partners in Crime, Agatha Christie's (1984)

Based on book 2 (of 5) of the Agatha Christie novels, this limited British TV series chronicles the adventures of Tommy and Prudence "Tuppence" Beresford as the duo take over operations of a London detective agency. Each installment of the show follows one of the mini-mysteries from the "Partners in Crime" short stories, seeing the newlyweds hot on the trail of missing jewels, poltergeists, poisoned chocolates, and more.