As Jon Bernthal’s face pings on to the screen from his California home, I’m peering in to his giant living room, looking for his three pit bull terriers. While he was, for a long time, mainly thought of as the square-jawed beefcake Shane Walsh in The Walking Dead (2010 to 2012, then again in 2018 and 2022), and later as the iron-pecced Punisher in two eponymous series and various episodes of Daredevil, the 47-year-old has become more associated with social conscience, on screen and off. He has a podcast, Real Ones, where he talks to people on the frontlines of...