This is the second episode (excluding the pilot) of the fan-produced "Star Trek New Voyages." The teleplay is by Trek veteran D.C. Fontana, and the cast features Walter Koenig. The QuickTime conversion was done at the same resolution as the original Windows Media, the highest-quality version of the episode available.
For Macintosh users, the XviD codec for QuickTime is included in the download. Like the episode itself, the codec is freely distributable under its licensing terms.