In episode 8 of “Frequencies,” Michael J. Johnson explains the details of his brief exile from Facebook. Then, he briefly talks about his frustration with delays in the last two issues of Marvel’s “Secret Wars.” Finally, in what he is currently “geeking out” about, he discusses “The Man in the High Castle” and the trailers for “Captain America: Civil War” and “Batman vs. Superman: Dawn of Justice.” Show notes are available at http://michaeljjohnsonmusic.com/blog.