“Locked In” (*1/2 out of four) was a drably done horror psychodrama that will make viewers themselves feel locked in their seats about a helpful nurse (Anna Friel) who is hired to attend to a patient (Famke Janssen) who has been in a coma and has severe mental/medical effects but soon finds there is more to her story than meets the eye and she uncovers dark secrets involving her doctor (Alex Hassell) and others (Finn Cole, Rose Williams, and others). Both inept and inert; the beautiful Janssen spends the entire film in a hospital bed and wheelchair, probably wishing Liam Neeson would finally agree to make “Taken 4.”