According to the plot, the legs of the hero Gary Sinise were amputated. To make everything look believable in the frame, they were wrapped in a special cloth and then erased on the computer. But an attentive viewer will notice in some episodes how Lieutenant Den focuses on legs that are not there. The hero's wheelchair was equipped with a system of mirrors. This trick is used by magicians to "remove" some parts of the body of the person sitting in it.