Prime Universe Edit
Richard Castillo was the helmsman of the USS Enterprise-C in 2344. When Captain Rachel Garrett was killed by a Klingon attack in an alternate timeline in the 2366 after the ship was displaced there due to a time rift, Castillo took acting command of the ship to insure the Enterprise would fix the timeline in its doomed defense of Narendra III in 2344, as originally intended. (TNG: "Yesterday's Enterprise")
Viggo Timeline Edit
Castillo was voted sexiest officer in the fleet three years in a row.