The Concord F-20 'Sound Camera' was one of the random tape recorders seen at the beginning of most episodes of the series, where it appeared in approximately 25 episodes for the mission briefing. It was also seen in various episodes being used by the IM Force during the course of a mission. This model was the least frequently used tape recorder, and today it is probably the 2nd rarest of the 3 most common models that were used in the series. Frequently used in the first 5 seasons, this model was last seen in a single appearance late in season 6.
