John Gallagher Jr.: John Gallagher Jr.. Actor: 10 Cloverfield Lane. John Gallagher Jr. has appeared in several television programs, including The West Wing (1999), Law & Order: Special Victims Unit (1999), NYPD Blue (1993), Ed (2000), Love Monkey (2006), and Hallmark Hall of Fame's film The Flamingo Rising (2001). He played Jim Harper in Aaron Sorkin's The Newsroom (2012) which aired on HBO. He also appeared in HBO's mini-series Olive Kitteridge (2014), based...