With Microsoft recently developing a basic "holo-desk" program that allows users to manipulate 3-D computer-generated objects, a second look has been given to Star Trek holodeck programs and their uses.  Whether holodecks were used for training, medical programs, sports and recreation, the re-creation of real-life characters, novels, childrens' entertainment and learning, or even sex, the programs filled a need in starship crews' lives. In this Captain's Log we take a look at the those times when the holodeck was used well, those times when it wasn't, and those moments that simply left you shaking your head.