“Under the Bed” has a terrific premise, making the universal childhood fear of monsters lurking in the blackness of a bedroom a very real and terrifying concern. That it manages to do very little with the plot comes as a tremendous disappointment, especially since the feature appears to have an itch to cause a Sam Raimi-style commotion with its horror elements. Drab and pokey, “Under the Bed” is strictly for patient genre enthusiasts, especially those able to manage the stasis of Steven C. Miller’s direction as he hunts for ways to cover for the film’s lack of budgetary might. Read the rest at Blu-ray.com