Callew's position changes several times when he is laying in the car, particularly after the convicts take his clothes. His mouth is sometimes closed, and he is in different positions on the seat, as seen by how far his head is extended from its edge.
When watching current film-transferred versions on a modern definition television, one can see William Callew (Joseph Cotton) blinking his eyes even though it was established earlier that he could not move anything, including his eyelids. This is especially noticeable when the two escaped convicts are moving his body and disrobing him in the car. This would not have been noticeable at the time of first broadcast due to the poor resolution of the televisions.