It extends the "Suburra" universe in "typically entertaining fashion", with lots of testing of family bonds, bold action on lasting vendettas, and an "overarching stretch of political theatre that reaches all the way into the Vatican".
"Spiritually", said Johnny Loftus on Decider, "Subterraeterna" has picked up right where "Suburra" left off. It extends the "Suburra" universe in "typically entertaining fashion", with lots of testing of family bonds, bold action on lasting vendettas, and an "overarching stretch of political theatre that reaches all the way into the Vatican". The city of Rome feels like it's "about to explode".