It didn't hit me until recently the similarity between the tv show Castle and the old comic series Maze Agency.
Both have a female detective (homicide detective Kate Beckett/p.i. Jennifer Mays) partnering with a male writer (mystery writer Richard Castle/true-crime magazine writer Gabriel Webb). Both are in a romantic relationship with their partner.
It would be a nice 'nod' to the comic if in a Castle episode there were copies of the comic laying around either Castle's or Beckett's apartment (both of them being comic collectors).