“Devil’s Workshop” (*1/2 out of four) was an anemic horror thriller about a struggling actor (Timothy Grananderos) desperate for work who finally lands a new role in a horror thriller and does research on this with a demonologist (Radha Mitchell) at her house but soon finds out that there might be more than meets the eye and she might be trying to demonically possess him. Interesting storyline of dark irony is bungled by tedious execution and monotonous script. Feature-length debut from noted short-film director Chris Von Hoffmann but judging from this effort he may need to go back to the filmmaking “workshop.”