Fargo Quiz

Everything about the leads of the FX series Fargo, across all five seasons. In scope: the twenty actors billed as the leads of their season, from the four who carried the first season to the three at the centre of the fifth. Out of scope: the rest of each season's billed cast, including the supporting investigators, siblings and hired men who are often the most quoted parts of a season, however well known those performers are. Also out of scope: the 1996 Coen brothers film of the same name, which is a separate work with a separate cast, and never an answer here. One season casts a single actor as two different characters, so the twenty answers cover twenty one roles. Season leads taken from the show's Wikipedia billing list in original credits order, with the first three seasons corroborated against Wikidata's cast statements on each season's own item, and every performer in the last two verified against their own Wikidata record. Clues describe only the setup, as the show's own listings do: nothing here gives away who did what, or how any season ends.