Complex sentence: Additionally, the cue was also played upon introduction of the first pricing game on the "Gameshow Marathon" episode; so far, this is the only time that it has been played during a non-Showcase Showdown segment.
Split into simpler sentences: Additionally, the cue was also played upon introduction of the first pricing game on the "Gameshow Marathon" episode. So far, this is the only time that it has been played during a non-Showcase Showdown segment.