Cardinal is a Canadian crime drama television series, which was first broadcast on January 25, 2017, on CTV (in English) and Super Écran (in French). The series adapts the novels of crime writer Giles Blunt, focusing on police detective John Cardinal (Billy Campbell) and his partner Lise Delorme (Karine Vanasse), who investigate crimes in the fictional city of Algonquin Bay.

Across six episodes, the first season adapts the novel Forty Words for Sorrow, which focuses on the investigation of the murder of a young girl. On February 28, 2017, CTV renewed Cardinal for a second and third season, each containing six episodes. The second season adapts Blunt's third Cardinal novel, Blackfly Season, while the third adapted the novels By the Time You Read This and Crime Machine, the fourth and fifth novels in the series. Episodes from the second season premiered a day in advance of their television broadcast on on-demand service Crave TV.

Filming on the third season completed in July 2018, and the season began airing on January 24, 2019.] CTV announced that the programme had also been renewed for a fourth season. Internationally, the series is broadcast on BBC Four in the United Kingdom, C More in Scandinavia, Calle 13 in Spain, Hulu in the United States, SBS in Australia and Germany, and Channel 11 in Israel.