By Brian Davids Writer [This story contains major spoilers from A Knight of the Seven Kingdoms’ season one finale, “The Morrow.”] After Sam Spruell’s indelible turn on Fargo season five, it was only a matter of time before another high-profile television universe scooped him up. The British actor now finds himself as a prickly Targaryen prince on Ira Parker and George R.R. Martin’s Game of Thrones prequel series, A Knight of the Seven Kingdoms. (Spruell also appeared on a couple episodes of Dune: Prophecy, which he shot before the world saw his portrayal of a “500-year-old sin-eater” on Fargo.) Spruell’s Prince Maekar Targaryen serves his royal dynasty roughly 90 years before the mothership series and nearly 80 years after House of the Dragon. He’s a widowed single father who’s badly missed the mark in raising his three sons, Daeron, Aerion and Aegon (“Egg”). He’s also long lived in the shadow of his more popular older brother, Prince Baelor Targaryen (Bertie Carvel), the heir to the Iron Throne.…