Steven Brust

Steven Brust is not one of the Powers That Be; however, he may (or may not) be the show runner for the Shadow Unit TV show. 

Devera (sometimes misspelled "Devra" ) is a character who repeatedly shows up in his books, and occasionally in those of other writers, including Emma Bull's.

In the universe of The Incrementalists (a novel by Brust and Skyler White), there was a Shadow Unit marathon over the weekend of the Fourth of July, 2012:
 * We continued being polite for a couple of hours, then Irene said she was going to graze for a while. I was just as glad. I turned to the TV and managed to catch forty-five minutes of the Fourth of July Shadow Unit marathon.

Said marathon was also briefly referred to in Brust's short story "Fireworks in the Rain":
 * I called it done. I stretched, loosening up my back, hips and shoulders. I made sure everything was in a nice pile on top of my cap so I wouldn’t forget anything. Then I checked the TV listings and grumbled. Last year over the Fourth of July weekend there’d been a "Shadow Unit" marathon, but I’d had no time to watch it. This year I had time, but I could only choose among "NCIS" or "Dallas" or a sci-fi show that I’d already seen a dozen times. I’d have liked to curl up next to Ren and watch something mindless, but it wasn’t any fun by myself. I went to bed.