"Spiderhead" was made for promos -- Chris Hemsworth! Miles Teller! The director of "Top Gun: Maverick!" The writers of "Deadpool!" -- without adding up to much of a movie.

Produced for Netflix, it's another sci-fi concept set about 10 minutes in the future, although its techno-babble about manipulating the brain doesn't help in selling what's on screen.

The premise involves a near-future penitentiary that doesn't require any bars, since the inmates are controlled and given the run of the place in exchange for wearing surgically implanted devices.

Steve, is using this space-age innovation to experiment on his charges, employing the tools of a fast-talking salesman to convince them to "honor our arrangement" and that this system is all to their.

It's not, but the extent to which Steve is transforming them into human guinea pigs comes through slowly, as he seems to be seeking real-world applications of this technology.

Meanwhile, a more conventional bond begins to form between two of the inmates, Jeff, who seems to be one of Steve's favorite subjects; and Lizzy, who like Jeff is nursing scars from the outside world.

Joseph Kosinski had time while "Maverick" sat on the shelf to go out and direct this relatively small-boned, almost claustrophobic movie, although with that film still registering big theatrical

it's hard to imagine his handlers would have chosen this low-key dud -- written by "Deadpool's" Rhett Reese and Paul Wernick but exhibiting little of that franchise's rambunctious energy.

Enticing mix of elements in "Spiderhead" -- a truly lousy title, incidentally, the marketability of arachnids notwithstanding -- is probably enough to vault the movie into its most-popular tier

which can surely be hailed as some kind of victory by the criteria that the service uses to keep score.

Because this is one of those movies that's forgotten almost as soon as it ends, and it doesn't even require any chemical intervention in order to erase the memory.