This week’s big releases offer up some variations on Hollywood’s most beloved genres: “Safe House,” a CIA mole-thriller with Denzel Washington and Ryan Reynolds; “Journey 2: The Mysterious Island,” a kid-friendly sci-fi adventure  starring The Rock and Michael Cain; and the tear-jerking amnesia romance “The Vow” starring Rachel McAdams and Channing Tatum. Rafer Guzman is film critic for Newsday, and co-host of the Takeaway’s Movie Date Podcast. Kristen Meinzer is culture producer for the Takeaway and also co-hosts the Movie Date podcast.