The Starfleet lieutenant piloting the shuttlecraft that carries Deanna Troi back from a conference and crashes on Vagra II in the episode Skin of Evil.
Lieutenant Ben Prieto is a shuttle pilot assigned to the Enterprise-D. He appears in the first-season episode Skin of Evil.
He is flying Counsellor Troi back to the ship in Shuttlecraft 13 when the craft suffers a failure and comes down on the desolate planet Vagra II. Prieto is badly hurt and unconscious in the wreck, which is then sealed off by Armus, a malevolent creature formed from the cast-off evil of a vanished race.
Armus refuses to let the rescue party reach the shuttle and kills Tasha Yar for his own amusement. Prieto lies injured throughout while Troi talks to the creature. When Picard distracts Armus and its energy field weakens, both survivors are beamed to safety.