“Maigret,” premiering Sunday on PBS, is the fourth British series (plus one failed pilot) to be titled “Maigret,” after its main character, Georges Simenon’s Paris-based police detective. Maigret series have also appeared in Russia, Italy and Japan; America, to the extent we’ve been interested, has imported English-language adaptations from the U.K., which is once again the case. The question of whether Wainwright’s Maigret is, you know, really Maigret, is one surely to be debated among the fans. Richard Harris, ‘Maigret’ (1988)This version is a curiosity, which gives us Maigret without the Simenon. Watch on PBS and stream on PBS.org, the PBS app and the PBS Masterpiece Prime Video channel.