- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Commander of a Delta Quadrant starship and leader of Renovation Team Nova. Yost was not concerned that his timetable for sealing a spatial sinkhole endangered the rescue of Tuvok and Paris.