Science Fiction is a medium ideally suited for philosophical and religious themes. Some great commentary on Sci-Fi from Catholic bloggers:
Der Wolfanwalt asks if robots can have souls.
John C. Wright makes a list of the essential 50 Sci-Fi authors.
Tony Rossi writes about the moral message of Fringe, one of my my favorite shows. H/T:CMR
Pat Archbold writes about Fringe and The Walking Dead.
Mark Shea theorizes about religious themes in Sci-Fi works made by atheists.
The monster Eegahlnc uses terrible movies to produce great Catholic commentary.